| MONTANA Climate Normals (1971-2000) other states |
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| MONTANA Climate Normals (1971-2000) other states |
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City:ALBION 1 N State:MT Lat:45.13N Long:104.16W Elev: 3312 ID:240088 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 1.9 8.3 17.7 28.7 39.2 48.6 53.9 51.9 39.7 28.5 15.6 4.8 28.2 Maximum 27.9 33.9 43.2 55.6 66.1 76.3 85.1 84.7 73.3 59.4 41.1 31.8 56.5 Mean 14.9 21.1 30.5 42.2 52.7 62.5 69.5 68.3 56.5 44.0 28.4 18.3 42.4 Precip. 0.29 0.31 0.52 1.55 2.59 2.79 1.92 1.44 0.98 1.12 0.48 0.32 14.31 HDD 1552 1230 1072 686 389 147 52 66 284 652 1100 1447 8677 CDD 0 0 0 0 6 71 192 168 28 0 0 0 465 City:ALDER 17 S State:MT Lat:45.04N Long:112.03W Elev: 5850 ID:240110 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 13.6 16.9 22.7 28.4 35.8 42.6 47.2 46.7 38.7 30.8 20.9 14.0 29.9 Maximum 31.9 36.5 43.2 52.0 60.7 69.4 78.0 77.3 67.4 56.1 40.1 32.1 53.7 Mean 22.8 26.7 33.0 40.2 48.3 56.0 62.6 62.0 53.1 43.5 30.5 23.1 41.8 Precip. 0.37 0.33 0.74 1.11 2.34 2.39 1.54 1.47 1.27 1.05 0.59 0.39 13.59 HDD 1309 1072 994 744 520 280 123 152 366 667 1036 1300 8563 CDD 0 0 0 0 0 11 48 59 8 0 0 0 126 City:ANACONDA State:MT Lat:46.08N Long:112.57W Elev: 5280 ID:240199 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 13.1 16.5 22.1 28.3 35.7 42.7 46.8 46.3 38.0 30.0 20.1 13.1 29.4 Maximum 35.2 39.9 46.6 55.3 64.2 72.8 80.4 80.5 70.2 58.4 42.5 34.9 56.7 Mean 24.2 28.2 34.4 41.8 50.0 57.8 63.6 63.4 54.1 44.2 31.3 24.0 43.1 Precip. 0.58 0.46 1.04 1.17 1.85 1.93 1.43 1.47 1.14 0.84 0.84 0.63 13.38 HDD 1267 1030 951 695 466 234 119 124 342 644 1012 1271 8155 CDD 0 0 0 0 0 16 77 73 15 0 0 0 181 City:AUGUSTA State:MT Lat:47.30N Long:112.24W Elev: 4070 ID:240364 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 11.7 15.7 22.1 29.6 37.8 45.3 49.0 47.7 39.5 31.5 21.8 14.1 30.5 Maximum 35.5 41.0 47.6 57.0 65.6 73.8 81.2 81.1 71.4 60.7 43.8 36.7 58.0 Mean 23.6 28.4 34.9 43.3 51.7 59.6 65.1 64.4 55.5 46.1 32.8 25.4 44.2 Precip. 0.51 0.43 0.65 1.17 2.55 2.25 1.45 1.51 1.28 0.85 0.54 0.56 13.75 HDD 1283 1027 934 651 413 192 89 111 307 586 967 1226 7786 CDD 0 0 0 0 1 28 92 92 20 0 0 0 233 City:AUSTIN 1 W State:MT Lat:46.38N Long:112.16W Elev: 4790 ID:240375 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 11.7 15.8 21.4 28.5 35.8 42.6 47.5 46.9 38.9 31.1 20.5 13.2 29.5 Maximum 27.9 33.5 42.0 52.5 61.6 70.1 78.0 77.1 65.8 52.6 35.5 28.4 52.1 Mean 19.8 24.7 31.7 40.5 48.7 56.4 62.8 62.0 52.4 41.9 28.0 20.8 40.8 Precip. 1.05 0.78 0.98 1.40 2.44 2.07 1.69 1.48 1.41 1.12 1.18 1.08 16.68 HDD 1402 1131 1033 736 505 273 135 155 392 717 1111 1370 8960 CDD 0 0 0 0 0 12 65 62 12 0 0 0 151 City:BABB 6 NE State:MT Lat:48.56N Long:113.22W Elev: 4300 ID:240392 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 9.0 13.0 19.6 27.6 35.1 41.4 44.9 44.1 36.5 30.2 19.4 11.5 27.7 Maximum 33.0 37.4 43.6 53.5 63.0 70.3 76.6 76.8 66.9 56.7 41.6 33.9 54.4 Mean 21.0 25.2 31.6 40.6 49.1 55.9 60.8 60.5 51.7 43.5 30.5 22.7 41.1 Precip. 0.64 0.58 0.88 1.24 2.94 3.02 2.03 2.08 1.72 0.93 0.88 0.80 17.74 HDD 1365 1115 1036 733 495 281 160 177 411 668 1036 1310 8787 CDD 0 0 0 0 0 6 28 36 12 0 0 0 82 City:BAKER 1 E State:MT Lat:46.22N Long:104.16W Elev: 2940 ID:240412 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.51 0.39 0.61 1.40 2.09 2.85 1.72 1.21 1.37 1.29 0.51 0.43 14.38 City:BALLANTINE State:MT Lat:45.57N Long:108.09W Elev: 3000 ID:240432 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 7.0 13.3 21.8 31.2 40.8 49.4 53.7 51.8 41.0 30.6 18.4 9.5 30.7 Maximum 33.7 41.2 50.8 61.2 70.7 81.3 89.2 88.6 76.8 64.1 46.4 36.5 61.7 Mean 20.4 27.3 36.3 46.2 55.8 65.4 71.5 70.2 58.9 47.4 32.4 23.0 46.2 Precip. 0.60 0.46 0.84 1.61 2.37 2.07 1.20 1.06 1.44 1.21 0.70 0.59 14.15 HDD 1384 1057 891 564 301 97 23 47 225 548 978 1301 7416 CDD 0 0 0 0 14 107 223 207 42 0 0 0 593 City:BARBER State:MT Lat:46.19N Long:109.22W Elev: 3730 ID:240466 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 10.4 14.1 20.9 29.3 38.3 46.5 51.2 49.5 40.5 30.6 19.0 11.9 30.2 Maximum 36.6 41.8 49.0 58.7 67.5 75.8 82.5 81.3 71.6 62.0 45.6 37.9 59.2 Mean 23.5 28.0 35.0 44.0 52.9 61.2 66.9 65.4 56.1 46.3 32.3 24.9 44.7 Precip. 0.50 0.32 0.55 1.07 2.13 2.06 1.55 1.28 1.02 0.88 0.46 0.42 12.24 HDD 1288 1037 932 631 378 160 66 89 288 581 982 1243 7675 CDD 0 0 0 0 2 45 124 101 18 0 0 0 290 City:BELGRADE AP (BOZEMAN) State:MT Lat:45.48N Long:111.09W Elev: 4427 ID:240622 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 7.6 13.5 21.0 29.0 37.1 43.8 48.8 47.6 38.5 28.8 17.1 8.0 28.4 Maximum 29.6 36.1 44.6 55.1 64.4 74.2 83.6 82.9 70.7 57.8 40.3 30.6 55.8 Mean 18.6 24.8 32.8 42.1 50.8 59.0 66.2 65.3 54.6 43.3 28.7 19.3 42.1 Precip. 0.60 0.54 1.02 1.40 2.49 2.41 1.19 1.14 1.43 1.11 0.81 0.57 14.71 HDD 1439 1125 997 687 443 207 80 95 326 674 1089 1416 8578 CDD 0 0 0 0 1 25 116 103 14 0 0 0 259 City:BELLTOWER State:MT Lat:45.38N Long:104.23W Elev: 3320 ID:240636 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.62 0.45 0.68 1.28 2.44 2.62 1.84 1.04 1.14 1.09 0.55 0.57 14.32 City:BIDDLE State:MT Lat:45.06N Long:105.20W Elev: 3329 ID:240739 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.43 0.26 0.65 1.34 2.34 2.39 1.79 1.09 1.16 1.25 0.38 0.32 13.40 City:BIDDLE 8 SW State:MT Lat:45.02N Long:105.29W Elev: 3597 ID:240743 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 7.3 13.0 20.6 29.5 39.0 48.4 54.5 52.7 42.0 31.1 18.7 9.7 30.5 Maximum 33.1 39.2 47.8 58.3 68.0 78.3 86.7 86.2 74.4 61.2 44.3 34.9 59.4 Mean 20.2 26.1 34.2 43.9 53.5 63.4 70.6 69.5 58.2 46.2 31.5 22.3 45.0 Precip. 0.46 0.41 0.85 1.56 2.55 2.58 1.60 0.97 1.38 1.26 0.59 0.51 14.72 HDD 1389 1089 955 634 366 138 41 60 244 585 1005 1324 7830 CDD 0 0 0 0 10 88 215 197 40 0 0 0 550 City:BIGFORK 13 S State:MT Lat:47.53N Long:114.02W Elev: 2910 ID:240755 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 22.0 24.0 28.7 34.6 41.1 47.7 53.0 53.0 44.1 37.0 29.5 24.1 36.6 Maximum 33.3 37.7 45.6 55.6 64.3 71.6 79.7 79.5 69.0 56.4 41.6 34.3 55.7 Mean 27.7 30.9 37.2 45.1 52.7 59.7 66.4 66.3 56.6 46.7 35.6 29.2 46.2 Precip. 1.64 1.18 1.44 1.62 2.94 2.76 1.72 1.61 1.82 1.47 1.75 1.92 21.87 HDD 1158 956 864 598 384 186 77 78 278 568 883 1110 7140 CDD 0 0 0 0 2 26 119 118 23 0 0 0 288 City:BIG SANDY State:MT Lat:48.08N Long:110.04W Elev: 2770 ID:240770 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 4.5 10.5 20.1 29.2 38.6 45.5 50.0 48.1 38.1 28.4 16.5 7.5 28.1 Maximum 30.1 37.5 48.7 61.0 70.8 79.2 86.7 86.3 74.7 62.2 43.7 33.5 59.5 Mean 17.3 24.0 34.4 45.1 54.7 62.4 68.4 67.2 56.4 45.3 30.1 20.5 43.8 Precip. 0.56 0.34 0.60 1.13 2.46 2.58 1.64 1.35 1.38 0.75 0.49 0.54 13.82 HDD 1479 1149 949 599 328 135 60 86 287 611 1047 1380 8110 CDD 0 0 0 1 9 62 163 160 29 0 0 0 424 City:BIG SKY 2 WNW State:MT Lat:45.17N Long:111.19W Elev: 6590 ID:240775 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 6.0 8.2 14.7 21.6 29.1 35.5 39.6 38.2 31.6 24.0 13.7 6.7 22.4 Maximum 30.1 36.0 42.7 50.0 60.5 69.7 78.4 78.4 68.2 56.2 38.6 30.2 53.3 Mean 18.1 22.1 28.7 35.8 44.8 52.6 59.0 58.3 49.9 40.1 26.2 18.5 37.8 Precip. 1.59 1.20 1.26 1.11 2.65 3.03 1.43 1.56 1.88 1.55 1.67 1.54 20.47 HDD 1455 1201 1125 876 627 376 205 223 453 773 1167 1442 9923 CDD 0 0 0 0 0 3 20 14 1 0 0 0 38 City:BIG TIMBER State:MT Lat:45.50N Long:109.57W Elev: 4100 ID:240780 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 13.3 17.5 22.8 30.6 39.3 47.4 52.1 50.8 41.0 31.9 23.0 16.0 32.1 Maximum 34.8 40.5 47.6 56.2 66.6 77.0 84.8 84.5 72.3 59.7 43.8 36.0 58.7 Mean 24.1 29.0 35.2 43.4 53.0 62.2 68.5 67.7 56.7 45.8 33.4 26.0 45.4 Precip. 0.65 0.50 0.93 1.79 2.79 2.60 1.54 1.25 1.28 1.37 0.72 0.69 16.11 HDD 1269 1009 924 648 376 140 49 62 274 595 948 1209 7503 CDD 0 0 0 0 2 56 156 144 24 0 0 0 382 City:BILLINGS WATER PLANT State:MT Lat:45.46N Long:108.29W Elev: 3097 ID:240802 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 13.3 18.3 25.4 33.8 43.1 51.2 56.2 54.8 44.9 35.3 24.0 15.8 34.7 Maximum 37.3 44.2 53.2 62.7 71.7 81.1 88.4 87.8 77.1 65.3 47.9 39.1 63.0 Mean 25.3 31.3 39.3 48.3 57.4 66.2 72.3 71.3 61.0 50.3 36.0 27.5 48.9 Precip. 0.62 0.49 0.87 1.55 2.39 1.98 1.19 0.92 1.42 1.32 0.64 0.57 13.96 HDD 1230 946 798 505 253 81 17 31 174 456 872 1164 6527 CDD 0 0 0 2 17 115 244 226 54 0 0 0 658 City:BILLINGS INTL AP State:MT Lat:45.48N Long:108.33W Elev: 3567 ID:240807 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 15.1 20.1 26.4 34.7 44.0 52.5 58.3 57.3 47.1 37.2 25.6 17.7 36.3 Maximum 32.8 39.5 47.6 57.5 67.4 78.0 85.8 84.5 71.8 58.9 42.7 34.5 58.4 Mean 24.0 29.8 37.0 46.1 55.7 65.2 72.0 70.9 59.5 48.1 34.1 26.1 47.4 Precip. 0.81 0.57 1.12 1.74 2.48 1.89 1.28 0.85 1.34 1.26 0.75 0.67 14.77 HDD 1280 1001 876 575 312 90 20 25 205 516 909 1195 7004 CDD 0 0 0 2 13 90 227 204 44 3 0 0 583 City:BIRNEY State:MT Lat:45.19N Long:106.31W Elev: 3160 ID:240819 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 5.1 11.6 20.8 29.5 39.3 48.0 52.4 50.1 39.7 29.3 17.4 7.0 29.2 Maximum 35.0 42.5 52.3 63.1 73.1 82.8 90.8 89.9 78.1 64.9 46.2 36.5 62.9 Mean 20.1 27.1 36.6 46.3 56.2 65.4 71.6 70.0 58.9 47.1 31.8 21.8 46.1 Precip. 0.59 0.39 0.85 1.40 2.20 2.46 1.32 0.95 1.04 1.07 0.76 0.54 13.57 HDD 1394 1063 882 561 286 95 21 39 222 555 997 1340 7455 CDD 0 0 0 0 13 108 227 193 39 0 0 0 580 City:BLACKLEAF State:MT Lat:48.01N Long:112.26W Elev: 4235 ID:240877 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 8.6 12.8 19.6 27.8 35.7 42.7 46.7 45.1 37.0 28.3 18.2 10.7 27.8 Maximum 34.3 38.6 44.4 54.1 62.6 70.3 78.2 78.4 68.1 58.1 42.5 35.6 55.4 Mean 21.5 25.7 32.0 41.0 49.2 56.5 62.5 61.8 52.6 43.2 30.4 23.2 41.6 Precip. 0.51 0.45 0.68 1.15 2.32 2.77 1.51 1.78 1.17 0.61 0.52 0.52 13.99 HDD 1350 1100 1024 721 491 269 141 172 391 676 1041 1297 8673 CDD 0 0 0 0 0 13 61 71 18 0 0 0 163 City:BLOOMFIELD 5 NNE State:MT Lat:47.32N Long:104.52W Elev: 2680 ID:240923 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 1.9 9.7 18.6 28.7 39.0 47.9 52.1 50.7 40.4 29.4 17.0 6.6 28.5 Maximum 24.0 31.7 43.5 57.0 68.9 78.4 84.9 84.8 72.4 58.9 39.1 28.2 56.0 Mean 13.0 20.7 31.1 42.9 54.0 63.2 68.5 67.8 56.4 44.2 28.1 17.4 42.3 Precip. 0.20 0.11 0.34 0.73 1.94 2.53 1.91 1.25 1.18 0.62 0.32 0.18 11.31 HDD 1613 1240 1053 666 354 137 51 83 286 647 1109 1475 8714 CDD 0 0 0 0 11 82 160 168 28 0 0 0 449 City:BOULDER State:MT Lat:46.14N Long:112.07W Elev: 4904 ID:241008 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 9.9 13.9 19.9 26.3 34.3 41.8 46.8 45.5 36.4 27.5 17.9 10.7 27.6 Maximum 34.3 39.5 46.6 55.8 64.6 73.8 82.2 82.0 71.4 59.6 42.1 34.6 57.2 Mean 22.1 26.7 33.3 41.1 49.5 57.8 64.5 63.8 53.9 43.6 30.0 22.7 42.4 Precip. 0.40 0.30 0.52 0.76 1.99 1.94 1.51 1.43 1.06 0.61 0.56 0.43 11.51 HDD 1331 1074 985 719 482 238 113 120 346 665 1050 1313 8436 CDD 0 0 0 0 0 22 97 82 12 0 0 0 213 City:BOZEMAN MONTANA ST UNIV State:MT Lat:45.40N Long:111.03W Elev: 4913 ID:241044 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 13.9 18.1 24.1 31.4 39.4 46.4 51.9 50.7 42.1 33.2 22.3 14.6 32.3 Maximum 33.4 38.6 46.0 55.5 64.5 73.7 81.8 81.7 71.0 59.0 41.8 34.1 56.8 Mean 23.7 28.4 35.1 43.5 52.0 60.1 66.9 66.2 56.6 46.1 32.1 24.4 44.6 Precip. 0.84 0.70 1.40 2.06 3.22 2.85 1.44 1.48 1.80 1.61 1.10 0.79 19.29 HDD 1283 1027 928 647 407 183 66 72 280 587 989 1260 7729 CDD 0 0 0 0 2 36 124 109 27 0 0 0 298 City:BOZEMAN 6 W EXP FARM State:MT Lat:45.41N Long:111.09W Elev: 4775 ID:241047 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 12.0 16.5 22.9 30.1 37.8 44.2 48.8 47.6 39.7 31.5 20.4 12.5 30.3 Maximum 33.2 38.7 46.5 56.3 65.3 73.9 81.8 81.6 71.2 58.9 41.8 33.9 56.9 Mean 22.6 27.6 34.7 43.2 51.6 59.1 65.3 64.6 55.5 45.2 31.1 23.2 43.6 Precip. 0.55 0.54 1.10 1.61 2.81 2.52 1.50 1.36 1.59 1.36 0.89 0.62 16.45 HDD 1314 1047 939 654 418 198 84 100 303 614 1017 1296 7984 CDD 0 0 0 0 1 20 93 87 15 0 0 0 216 City:BOZEMAN 12 NE State:MT Lat:45.49N Long:110.53W Elev: 5950 ID:241050 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 9.8 12.4 17.7 24.4 31.6 37.5 40.8 39.3 33.2 26.8 17.6 10.3 25.1 Maximum 32.8 36.6 41.9 49.2 58.2 66.9 74.8 75.0 64.6 54.0 39.3 33.0 52.2 Mean 21.3 24.5 29.8 36.8 44.9 52.2 57.8 57.2 48.9 40.4 28.5 21.7 38.7 Precip. 2.56 1.72 2.55 3.54 4.70 4.37 2.29 2.38 2.73 2.57 2.54 2.18 34.13 HDD 1355 1134 1092 845 623 385 236 253 484 763 1097 1344 9611 CDD 0 0 0 0 0 1 13 10 1 0 0 0 25 City:BRADY 27 ENE THE KNEES State:MT Lat:48.05N Long:111.16W Elev: 3325 ID:241081 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.41 0.25 0.54 0.89 1.95 2.06 1.50 1.33 1.03 0.56 0.43 0.31 11.26 City:BRANDENBERG State:MT Lat:45.49N Long:106.14W Elev: 2770 ID:241084 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 8.5 14.5 22.9 31.9 41.2 49.8 54.3 52.5 42.0 32.4 20.5 11.2 31.8 Maximum 34.1 41.3 50.7 62.4 72.7 82.7 91.5 90.5 77.7 63.8 46.0 36.5 62.5 Mean 21.3 27.9 36.8 47.2 57.0 66.3 72.9 71.5 59.9 48.1 33.3 23.9 47.2 Precip. 0.65 0.48 0.80 1.61 2.44 2.31 1.16 1.02 1.23 1.37 0.70 0.59 14.36 HDD 1354 1038 874 536 269 95 25 33 199 524 951 1275 7173 CDD 0 0 0 0 19 134 268 234 45 0 0 0 700 City:BREDETTE State:MT Lat:48.33N Long:105.16W Elev: 2687 ID:241088 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 1.7 9.3 19.3 30.9 41.9 50.3 54.8 54.0 43.6 33.0 18.0 6.0 30.2 Maximum 20.9 28.4 40.2 55.8 68.4 77.6 83.4 83.1 70.4 56.8 36.5 24.7 53.9 Mean 11.3 18.9 29.8 43.4 55.2 64.0 69.1 68.6 57.0 44.9 27.3 15.4 42.1 Precip. 0.28 0.22 0.49 0.85 1.87 2.79 2.46 1.39 1.21 0.70 0.38 0.34 12.98 HDD 1666 1293 1092 651 326 127 50 85 280 625 1132 1540 8867 CDD 0 0 0 2 21 95 176 195 40 0 0 0 529 City:BRIDGER 2 N State:MT Lat:45.20N Long:108.55W Elev: 3630 ID:241102 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 8.9 13.9 22.0 29.3 39.6 47.7 52.5 50.9 40.0 30.6 19.2 11.7 30.5 Maximum 33.9 41.0 50.9 59.0 69.5 79.6 87.1 86.5 75.0 62.3 45.1 36.4 60.5 Mean 21.4 27.5 36.5 44.2 54.6 63.7 69.8 68.7 57.5 46.5 32.2 24.1 45.6 Precip. 0.77 0.57 1.04 1.69 2.43 1.63 0.85 0.73 1.23 1.29 0.68 0.57 13.48 HDD 1352 1052 886 625 334 119 36 51 259 575 985 1270 7544 CDD 0 0 0 0 8 79 184 165 34 0 0 0 470 City:BROADUS State:MT Lat:45.27N Long:105.25W Elev: 3032 ID:241127 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 8.6 14.9 22.6 31.7 41.5 50.7 56.1 54.5 43.5 32.9 20.7 11.2 32.4 Maximum 32.8 39.7 49.1 60.3 70.4 80.1 87.9 87.1 75.2 62.2 45.1 35.2 60.4 Mean 20.7 27.3 35.9 46.0 56.0 65.4 72.0 70.8 59.4 47.6 32.9 23.2 46.4 Precip. 0.49 0.41 0.87 1.56 2.30 2.17 1.52 0.90 1.04 1.24 0.59 0.50 13.59 HDD 1374 1057 904 570 297 104 26 36 207 541 963 1296 7375 CDD 0 0 0 0 17 116 243 215 38 0 0 0 629 City:BROADVIEW State:MT Lat:46.06N Long:108.53W Elev: 3881 ID:241149 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 10.9 15.5 22.6 30.4 39.4 47.4 52.0 50.9 41.5 32.7 21.2 13.8 31.5 Maximum 35.5 41.0 48.0 57.9 67.4 77.2 84.9 84.5 73.1 61.4 44.5 37.3 59.4 Mean 23.2 28.3 35.3 44.2 53.4 62.3 68.5 67.7 57.3 47.1 32.9 25.6 45.5 Precip. 0.40 0.36 0.72 1.11 2.73 1.72 1.43 1.13 1.26 1.03 0.42 0.37 12.68 HDD 1297 1029 921 626 364 142 53 69 265 557 965 1223 7511 CDD 0 0 0 0 4 60 160 153 34 0 0 0 411 City:BROCKWAY 3 WSW State:MT Lat:47.17N Long:105.50W Elev: 2630 ID:241169 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 5.0 12.7 22.0 32.5 42.9 51.6 55.3 53.9 42.2 31.6 18.8 8.5 31.4 Maximum 25.9 33.4 44.4 58.1 69.1 78.4 85.4 84.8 72.4 59.4 40.9 29.6 56.8 Mean 15.5 23.1 33.2 45.3 56.0 65.0 70.4 69.4 57.3 45.5 29.9 19.1 44.1 Precip. 0.23 0.18 0.42 0.97 1.90 2.31 1.71 1.19 1.29 0.80 0.26 0.26 11.52 HDD 1536 1176 986 591 301 113 42 72 273 605 1054 1426 8175 CDD 0 0 0 0 22 113 209 206 41 0 0 0 591 City:BROWNING State:MT Lat:48.34N Long:113.01W Elev: 4355 ID:241202 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.75 0.76 0.77 1.24 1.77 1.87 1.52 1.55 1.02 0.79 0.69 0.65 13.38 City:BRUSETT 3 N State:MT Lat:47.28N Long:107.19W Elev: 3170 ID:241231 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.40 0.29 0.57 1.09 2.39 2.34 1.76 1.33 1.32 0.77 0.48 0.52 13.26 City:BUSBY State:MT Lat:45.32N Long:106.58W Elev: 3430 ID:241297 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 5.6 11.2 20.6 29.7 38.4 46.9 51.0 49.6 39.6 29.4 17.6 7.5 28.9 Maximum 32.0 38.1 47.7 59.4 69.2 79.2 87.9 87.6 75.5 61.8 44.5 34.0 59.7 Mean 18.8 24.7 34.2 44.6 53.8 63.1 69.5 68.6 57.6 45.6 31.1 20.8 44.4 Precip. 0.72 0.54 0.83 1.42 2.25 2.45 1.17 0.85 1.39 1.37 0.87 0.67 14.53 HDD 1433 1129 957 614 353 134 44 58 253 600 1019 1372 7966 CDD 0 0 0 0 5 75 182 170 30 0 0 0 462 City:BUTTE MOONEY AP State:MT Lat:45.57N Long:112.30W Elev: 5540 ID:241318 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 5.4 9.6 18.5 26.4 34.3 41.4 45.5 44.1 35.3 26.2 15.3 5.7 25.6 Maximum 29.7 34.7 42.1 51.6 60.8 70.7 79.8 79.0 67.8 55.5 38.9 29.9 53.4 Mean 17.6 22.2 30.3 39.0 47.6 56.1 62.7 61.6 51.6 40.9 27.1 17.8 39.5 Precip. 0.53 0.47 0.83 1.02 2.02 2.07 1.47 1.36 1.09 0.79 0.60 0.53 12.78 HDD 1471 1199 1077 781 540 278 129 165 410 748 1137 1464 9399 CDD 0 0 0 0 0 9 55 57 6 0 0 0 127 City:CANYON FERRY DAM State:MT Lat:46.39N Long:111.44W Elev: 3672 ID:241470 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 13.8 17.7 25.0 32.3 40.1 47.4 52.1 51.6 43.7 35.3 25.9 16.8 33.5 Maximum 31.2 37.4 46.9 57.2 66.4 75.0 83.3 83.3 72.0 59.1 42.6 33.4 57.3 Mean 22.5 27.6 36.0 44.8 53.3 61.2 67.7 67.5 57.9 47.2 34.3 25.1 45.4 Precip. 0.45 0.31 0.55 0.94 1.96 1.83 1.47 1.30 1.11 0.66 0.46 0.46 11.50 HDD 1318 1048 901 607 367 161 59 58 236 552 923 1237 7467 CDD 0 0 0 0 2 47 143 135 22 0 0 0 349 City:CARLYLE 12 NW State:MT Lat:46.45N Long:104.17W Elev: 3029 ID:241518 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 5.7 12.2 20.3 30.0 40.6 49.7 54.8 53.5 43.5 33.1 20.0 9.7 31.1 Maximum 26.2 33.6 43.4 56.3 67.4 76.7 84.2 83.8 71.6 58.6 40.3 29.7 56.0 Mean 16.0 22.9 31.9 43.2 54.0 63.2 69.5 68.7 57.6 45.9 30.2 19.7 43.6 Precip. 0.48 0.45 0.75 1.52 2.27 2.63 1.91 1.45 1.47 1.29 0.67 0.53 15.42 HDD 1521 1178 1027 655 356 142 50 71 265 594 1047 1406 8312 CDD 0 0 0 0 14 89 190 184 41 0 0 0 518 City:CARTER 14 W State:MT Lat:47.48N Long:111.13W Elev: 3450 ID:241525 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 7.4 12.5 20.2 30.2 39.6 46.9 51.3 51.1 42.1 32.2 19.2 12.5 30.4 Maximum 29.6 36.4 44.5 55.7 65.9 75.6 83.4 83.6 71.6 59.4 40.8 32.8 56.6 Mean 18.5 24.5 32.4 43.0 52.8 61.3 67.4 67.4 56.9 45.8 30.0 22.7 43.6 Precip. 0.40 0.35 0.73 1.00 2.18 1.90 1.43 1.66 1.18 0.76 0.48 0.34 12.41 HDD 1441 1135 1013 662 382 160 60 82 286 596 1050 1313 8180 CDD 0 0 0 0 2 47 133 155 41 0 0 0 378 City:CASCADE 5 S State:MT Lat:47.13N Long:111.43W Elev: 3360 ID:241552 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 15.0 19.0 24.9 32.6 40.7 47.8 50.6 49.6 41.3 34.6 25.6 18.1 33.3 Maximum 35.9 41.0 48.4 58.1 66.9 75.4 83.3 82.9 72.0 61.0 44.9 37.7 59.0 Mean 25.5 30.0 36.7 45.4 53.8 61.6 67.0 66.3 56.7 47.8 35.3 27.9 46.2 Precip. 0.58 0.50 0.98 1.77 2.95 2.28 1.58 1.61 1.64 1.22 0.67 0.57 16.35 HDD 1225 979 880 588 349 151 56 94 275 533 892 1150 7172 CDD 0 0 0 0 2 49 118 133 25 0 0 0 327 City:CASCADE 20 SSE State:MT Lat:47.00N Long:111.35W Elev: 4600 ID:241557 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 12.2 15.8 20.7 27.2 34.6 41.0 43.5 43.1 35.7 29.5 21.2 14.3 28.2 Maximum 35.8 40.2 46.2 54.9 63.6 71.9 79.8 80.1 69.7 58.6 43.1 36.8 56.7 Mean 24.0 28.0 33.5 41.1 49.1 56.5 61.7 61.6 52.7 44.1 32.2 25.6 42.5 Precip. 0.50 0.37 0.73 1.19 2.72 2.47 1.63 1.44 1.49 0.91 0.55 0.45 14.45 HDD 1271 1035 979 718 494 267 144 159 378 651 985 1224 8305 CDD 0 0 0 0 0 10 41 53 9 0 0 0 113 City:CHESTER State:MT Lat:48.31N Long:110.58W Elev: 3165 ID:241692 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 3.9 9.1 18.8 28.7 39.1 46.5 50.5 49.3 39.0 28.3 15.6 6.2 27.9 Maximum 28.1 35.1 45.1 58.0 67.7 75.4 82.6 82.2 71.2 59.3 40.5 30.4 56.3 Mean 16.0 22.1 32.0 43.4 53.4 61.0 66.6 65.8 55.1 43.8 28.1 18.3 42.1 Precip. 0.38 0.26 0.51 0.71 1.77 2.20 1.47 1.21 0.84 0.48 0.36 0.39 10.58 HDD 1520 1202 1025 651 363 158 75 101 321 657 1108 1448 8629 CDD 0 0 0 0 2 37 123 125 24 0 0 0 311 City:CHINOOK State:MT Lat:48.35N Long:109.14W Elev: 2345 ID:241722 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum -0.5 6.2 16.7 29.9 40.8 49.9 53.1 51.4 38.6 27.2 13.4 3.7 27.5 Maximum 25.9 33.4 45.1 58.9 69.1 77.8 84.0 83.7 72.1 59.2 40.3 29.7 56.6 Mean 12.7 19.8 30.9 44.4 55.0 63.9 68.6 67.6 55.4 43.2 26.9 16.7 42.1 Precip. 0.54 0.32 0.56 0.99 2.29 2.29 1.66 1.34 1.43 0.66 0.47 0.51 13.06 HDD 1624 1265 1058 618 318 108 38 69 314 675 1145 1497 8729 CDD 0 0 0 0 7 74 147 148 25 0 0 0 401 City:CHOTEAU State:MT Lat:47.49N Long:112.12W Elev: 3845 ID:241737 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 13.2 17.4 23.8 31.7 40.2 47.8 51.7 51.0 42.7 34.7 23.6 16.1 32.8 Maximum 33.7 39.2 46.3 56.0 65.3 73.7 81.0 80.9 70.3 59.4 42.5 35.7 57.0 Mean 23.5 28.3 35.1 43.9 52.8 60.8 66.4 66.0 56.5 47.1 33.1 25.9 45.0 Precip. 0.25 0.19 0.34 0.72 2.00 2.15 1.31 1.38 0.99 0.52 0.25 0.22 10.32 HDD 1288 1029 928 635 383 174 75 98 292 557 958 1212 7629 CDD 0 0 0 0 2 45 117 127 38 0 0 0 329 City:CIRCLE State:MT Lat:47.25N Long:105.35W Elev: 2440 ID:241758 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 5.7 12.5 21.2 31.5 42.0 50.7 55.2 54.2 42.9 32.3 19.7 9.1 31.4 Maximum 27.0 34.2 44.7 58.3 69.6 79.4 86.4 86.2 73.8 60.0 41.5 30.6 57.6 Mean 16.4 23.4 33.0 44.9 55.8 65.1 70.8 70.2 58.4 46.2 30.6 19.9 44.6 Precip. 0.42 0.36 0.64 1.15 1.94 2.39 1.94 1.29 1.35 0.93 0.44 0.43 13.28 HDD 1510 1166 994 603 305 110 39 65 245 585 1033 1399 8054 CDD 0 0 0 0 20 112 219 225 45 0 0 0 621 City:CLEVELAND 5 ENE State:MT Lat:48.19N Long:109.04W Elev: 3333 ID:241824 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 7.7 12.0 20.1 29.8 39.3 46.0 50.0 49.1 40.3 30.9 17.8 10.4 29.5 Maximum 30.6 36.0 44.1 56.3 66.1 74.5 80.7 80.2 69.6 58.8 42.1 33.5 56.0 Mean 19.2 24.0 32.1 43.1 52.7 60.3 65.4 64.7 55.0 44.9 30.0 22.0 42.8 Precip. 0.74 0.50 1.16 1.60 2.72 2.60 1.69 1.14 1.42 0.93 0.86 0.76 16.12 HDD 1422 1148 1021 658 388 178 87 130 329 624 1051 1334 8370 CDD 0 0 0 0 7 36 98 119 27 0 0 0 287 City:COHAGEN State:MT Lat:47.03N Long:106.37W Elev: 2715 ID:241875 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 4.9 11.4 20.2 29.7 39.7 48.9 53.3 52.1 40.9 30.7 18.0 8.1 29.8 Maximum 30.5 38.1 48.7 61.4 71.6 81.1 88.5 88.4 76.3 62.8 44.1 33.6 60.4 Mean 17.7 24.8 34.5 45.6 55.7 65.0 70.9 70.3 58.6 46.8 31.1 20.9 45.2 Precip. 0.44 0.28 0.49 1.02 2.09 2.07 1.65 1.07 1.32 0.91 0.42 0.45 12.21 HDD 1467 1127 947 584 305 108 31 52 234 566 1019 1369 7809 CDD 0 0 0 0 16 108 214 214 41 0 0 0 593 City:COLSTRIP State:MT Lat:45.54N Long:106.38W Elev: 3218 ID:241905 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 10.3 15.9 24.2 33.3 42.9 52.0 57.2 56.0 45.5 35.4 23.0 13.6 34.1 Maximum 33.4 39.4 47.6 57.7 67.6 77.7 85.4 85.0 72.9 60.4 44.1 36.1 58.9 Mean 21.9 27.7 35.9 45.5 55.3 64.9 71.3 70.5 59.2 47.9 33.6 24.9 46.6 Precip. 0.58 0.43 0.87 1.34 2.59 2.51 1.35 1.09 1.32 1.35 0.65 0.48 14.56 HDD 1338 1046 902 586 318 116 31 44 217 529 942 1244 7313 CDD 0 0 0 0 16 111 227 216 43 0 0 0 613 City:COLUMBUS State:MT Lat:45.38N Long:109.16W Elev: 3585 ID:241938 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 9.9 15.1 23.0 30.7 39.4 47.0 52.0 50.3 40.7 31.0 20.4 12.0 31.0 Maximum 35.8 42.5 50.8 60.0 69.3 78.8 86.2 85.1 74.2 62.5 45.4 37.0 60.6 Mean 22.9 28.8 36.9 45.4 54.4 62.9 69.1 67.7 57.5 46.8 32.9 24.5 45.8 Precip. 0.71 0.62 1.11 1.88 2.91 1.91 1.34 1.06 1.46 1.33 0.68 0.66 15.67 HDD 1307 1014 872 590 337 127 35 61 249 566 963 1257 7378 CDD 0 0 0 0 6 65 162 145 24 0 0 0 402 City:CONRAD State:MT Lat:48.11N Long:111.58W Elev: 3550 ID:241974 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 7.0 11.7 19.4 28.0 37.5 44.8 48.3 47.4 38.0 28.9 17.1 9.9 28.2 Maximum 31.7 37.2 45.6 56.9 66.1 73.8 80.2 80.2 69.9 58.8 41.7 34.0 56.3 Mean 19.4 24.5 32.5 42.5 51.8 59.3 64.3 63.8 54.0 43.9 29.4 22.0 42.3 Precip. 0.44 0.33 0.67 1.04 2.17 2.23 1.22 1.45 1.01 0.58 0.47 0.45 12.06 HDD 1415 1136 1008 677 409 193 100 125 346 655 1068 1335 8467 CDD 0 0 0 0 0 21 77 88 16 0 0 0 202 City:CONTENT 3 SSE State:MT Lat:47.59N Long:107.33W Elev: 2340 ID:241984 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 4.3 10.8 20.6 30.7 41.1 49.5 53.9 52.5 41.6 31.2 17.9 7.4 30.1 Maximum 27.2 34.4 45.2 58.3 69.1 78.2 85.3 85.0 72.7 60.2 41.9 31.2 57.4 Mean 15.8 22.6 32.9 44.5 55.1 63.9 69.6 68.8 57.2 45.7 29.9 19.3 43.8 Precip. 0.35 0.25 0.52 0.97 2.24 2.26 1.66 1.22 1.06 0.70 0.36 0.38 11.97 HDD 1527 1187 995 615 320 123 44 75 271 598 1054 1417 8226 CDD 0 0 0 0 13 89 185 192 36 0 0 0 515 City:COOKE CITY 2 W State:MT Lat:45.01N Long:109.58W Elev: 7460 ID:241995 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 2.1 4.2 10.1 17.6 26.5 32.9 37.6 36.5 28.9 21.6 10.5 2.3 19.2 Maximum 23.6 30.4 36.8 44.3 53.7 64.3 73.0 72.0 61.6 48.9 31.6 23.1 46.9 Mean 12.9 17.3 23.5 31.0 40.1 48.6 55.3 54.3 45.3 35.3 21.1 12.7 33.1 Precip. 2.29 1.79 2.00 1.78 2.69 2.85 2.16 2.08 1.95 1.59 2.05 2.24 25.47 HDD 1617 1335 1287 1022 772 493 305 336 593 922 1320 1622 11624 CDD 0 0 0 0 0 0 5 3 0 0 0 0 8 City:CRESTON State:MT Lat:48.11N Long:114.08W Elev: 2940 ID:242104 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 15.1 18.6 25.3 31.9 39.6 46.0 49.3 47.6 38.6 30.3 24.5 17.6 32.0 Maximum 30.4 36.1 44.5 55.0 63.8 70.8 78.5 79.4 68.2 55.4 39.8 31.5 54.5 Mean 22.8 27.4 34.9 43.5 51.7 58.4 63.9 63.5 53.4 42.9 32.2 24.6 43.3 Precip. 1.32 1.19 1.31 1.71 2.54 2.86 1.80 1.48 1.59 1.25 1.54 1.59 20.18 HDD 1310 1054 933 647 413 215 110 112 355 686 986 1255 8076 CDD 0 0 0 0 1 17 76 66 7 0 0 0 167 City:CROW AGENCY State:MT Lat:45.36N Long:107.27W Elev: 3030 ID:242112 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 3.8 10.8 21.3 31.0 40.1 48.4 53.1 52.1 41.1 30.4 17.2 6.3 29.6 Maximum 31.8 39.7 49.7 60.4 69.3 80.0 87.8 87.9 75.5 64.2 45.1 34.1 60.5 Mean 17.8 25.3 35.5 45.7 54.7 64.2 70.5 70.0 58.3 47.3 31.2 20.2 45.1 Precip. 0.83 0.62 1.06 1.82 2.46 2.01 1.14 0.98 1.71 1.47 1.03 0.68 15.81 HDD 1463 1114 915 579 327 109 31 46 235 549 1016 1390 7774 CDD 0 0 0 0 7 85 199 201 35 0 0 0 527 City:CULBERTSON State:MT Lat:48.09N Long:104.31W Elev: 1920 ID:242122 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum -1.1 7.8 18.7 29.7 41.5 49.9 54.0 52.5 41.6 30.6 15.8 3.6 28.7 Maximum 22.1 31.4 44.5 60.5 72.6 81.2 87.0 86.5 73.7 60.6 39.1 26.4 57.1 Mean 10.5 19.6 31.6 45.1 57.1 65.6 70.5 69.5 57.7 45.6 27.5 15.0 42.9 Precip. 0.31 0.23 0.49 0.91 2.09 2.82 2.30 1.25 1.53 0.82 0.46 0.37 13.58 HDD 1692 1271 1036 598 276 99 38 67 256 602 1127 1549 8611 CDD 0 0 0 1 28 115 209 205 35 0 0 0 593 City:CUT BANK MUNICIPAL AP State:MT Lat:48.37N Long:112.23W Elev: 3838 ID:242173 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 9.5 13.7 21.0 29.7 38.3 45.8 49.9 49.3 40.5 31.7 20.9 12.6 30.2 Maximum 28.4 33.7 40.7 52.2 61.1 68.6 76.3 75.6 65.3 54.0 38.0 29.9 52.0 Mean 19.0 23.7 30.9 41.0 49.7 57.2 63.1 62.5 52.9 42.9 29.5 21.3 41.1 Precip. 0.39 0.28 0.55 0.90 2.22 2.48 1.58 1.71 1.18 0.47 0.42 0.33 12.51 HDD 1428 1157 1059 723 475 249 129 172 379 687 1066 1356 8880 CDD 0 0 0 0 0 15 70 94 16 0 0 0 195 City:DARBY State:MT Lat:46.01N Long:114.11W Elev: 3880 ID:242221 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 18.5 21.5 27.1 32.6 39.8 45.6 49.0 48.3 41.1 33.4 25.4 18.9 33.4 Maximum 35.9 42.3 50.6 58.7 67.4 75.4 83.8 83.7 73.3 61.7 44.6 36.4 59.5 Mean 27.2 31.9 38.9 45.7 53.6 60.5 66.4 66.0 57.2 47.6 35.0 27.7 46.5 Precip. 1.46 1.08 0.97 1.16 2.03 1.99 1.08 1.23 1.13 1.07 1.49 1.51 16.20 HDD 1173 926 810 580 357 164 67 78 252 540 901 1158 7006 CDD 0 0 0 0 2 30 111 109 18 0 0 0 270 City:DECKER 4 NNE State:MT Lat:45.04N Long:106.47W Elev: 3500 ID:242266 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.53 0.37 0.68 1.34 2.04 1.93 1.23 0.70 1.08 0.92 0.69 0.54 12.05 City:DEER LODGE 3 W State:MT Lat:46.23N Long:112.48W Elev: 4850 ID:242275 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 10.6 15.2 21.2 25.8 32.9 39.2 42.8 41.4 33.3 26.1 17.8 10.6 26.4 Maximum 35.0 40.1 47.7 57.5 64.9 73.0 80.3 80.4 70.8 59.6 44.1 35.1 57.4 Mean 22.8 27.7 34.5 41.7 48.9 56.1 61.6 60.9 52.1 42.9 31.0 22.9 41.9 Precip. 0.33 0.28 0.47 0.69 1.89 1.62 1.49 1.38 1.10 0.57 0.40 0.38 10.60 HDD 1307 1045 946 701 499 276 153 173 392 687 1022 1306 8507 CDD 0 0 0 0 0 8 46 46 4 0 0 0 104 City:DEL BONITA State:MT Lat:49.00N Long:112.47W Elev: 4337 ID:242301 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 9.0 13.4 19.9 27.7 36.3 43.2 46.7 46.5 38.8 30.6 18.9 11.6 28.6 Maximum 29.5 34.4 41.4 53.3 63.4 70.4 76.8 77.0 67.5 56.1 38.5 31.2 53.3 Mean 19.3 23.9 30.7 40.5 49.9 56.8 61.8 61.8 53.2 43.4 28.7 21.4 41.0 Precip. 0.42 0.35 0.73 1.22 2.58 2.85 1.69 1.85 1.50 0.52 0.54 0.38 14.63 HDD 1419 1151 1065 736 469 256 154 181 375 670 1090 1351 8917 CDD 0 0 0 0 0 9 52 79 19 0 0 0 159 City:DENTON State:MT Lat:47.19N Long:109.56W Elev: 3610 ID:242347 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 3.3 9.0 16.9 26.3 35.8 43.4 46.3 45.5 36.0 25.8 14.5 6.6 25.8 Maximum 31.3 37.5 45.4 55.8 65.1 74.1 81.3 81.7 70.4 59.0 42.7 34.2 56.5 Mean 17.3 23.3 31.2 41.1 50.5 58.8 63.8 63.6 53.2 42.4 28.6 20.4 41.2 Precip. 0.50 0.34 0.70 1.16 2.70 2.65 1.91 1.78 1.48 0.92 0.48 0.50 15.12 HDD 1479 1169 1050 718 451 208 107 128 365 701 1091 1382 8849 CDD 0 0 0 0 0 19 68 84 11 0 0 0 182 City:DILLON AP State:MT Lat:45.15N Long:112.33W Elev: 5216 ID:242404 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 11.9 15.8 22.3 28.9 36.7 44.0 48.6 47.7 39.2 30.6 19.7 11.9 29.8 Maximum 33.1 39.0 46.6 55.4 63.9 73.1 81.2 80.3 69.7 57.9 41.7 33.0 56.2 Mean 22.5 27.4 34.5 42.2 50.3 58.6 64.9 64.0 54.5 44.3 30.7 22.5 43.0 Precip. 0.26 0.20 0.53 0.95 1.81 1.77 1.14 1.08 0.97 0.64 0.36 0.23 9.94 HDD 1318 1053 947 686 456 216 87 108 333 643 1029 1318 8194 CDD 0 0 0 0 0 23 84 77 15 0 0 0 199 City:DILLON WMCE State:MT Lat:45.13N Long:112.39W Elev: 5228 ID:242409 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 13.5 16.9 23.0 29.2 36.8 43.4 47.4 46.0 38.8 31.2 21.2 14.0 30.1 Maximum 34.4 40.4 48.1 57.3 66.3 75.2 83.5 82.3 72.2 60.2 42.9 34.2 58.1 Mean 24.0 28.7 35.6 43.3 51.6 59.3 65.5 64.2 55.5 45.7 32.1 24.1 44.1 Precip. 0.37 0.25 0.66 1.22 2.25 1.87 1.19 1.18 1.07 0.85 0.39 0.35 11.65 HDD 1274 1018 914 654 417 188 73 93 298 599 990 1269 7787 CDD 0 0 0 0 0 17 86 67 13 0 0 0 183 City:DIVIDE State:MT Lat:45.45N Long:112.45W Elev: 5350 ID:242421 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 5.6 9.1 17.3 25.2 33.5 39.7 43.7 42.0 33.3 23.8 13.6 6.5 24.4 Maximum 30.9 36.0 42.8 51.7 61.0 69.9 78.5 77.6 67.5 56.1 39.6 30.7 53.5 Mean 18.3 22.6 30.1 38.5 47.3 54.8 61.1 59.8 50.4 40.0 26.6 18.6 39.0 Precip. 0.46 0.42 0.77 0.99 1.91 2.09 1.31 1.39 1.14 0.70 0.57 0.53 12.28 HDD 1450 1189 1085 798 552 313 164 195 443 777 1152 1439 9557 CDD 0 0 0 0 0 7 44 33 5 0 0 0 89 City:DODSON State:MT Lat:48.24N Long:108.15W Elev: 2280 ID:242438 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.51 0.37 0.57 0.73 2.15 2.38 1.41 1.15 1.10 0.55 0.43 0.49 11.84 City:DRUMMOND AVIATION State:MT Lat:46.38N Long:113.11W Elev: 4000 ID:242500 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 11.6 15.7 22.5 28.2 35.4 42.3 44.8 43.9 36.1 28.1 19.7 12.2 28.4 Maximum 30.6 37.8 48.2 58.4 66.8 75.2 83.7 83.2 72.2 58.3 39.6 30.0 57.0 Mean 21.1 26.8 35.4 43.3 51.1 58.8 64.3 63.6 54.2 43.2 29.7 21.1 42.7 Precip. 0.79 0.61 0.75 0.98 1.96 1.66 1.15 1.29 1.06 0.77 0.79 0.80 12.61 HDD 1360 1071 919 651 431 210 99 104 333 676 1060 1362 8276 CDD 0 0 0 0 1 21 76 60 7 0 0 0 165 City:EAST GLACIER State:MT Lat:48.27N Long:113.13W Elev: 4806 ID:242629 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 9.0 12.5 18.0 26.3 33.9 40.4 44.1 43.3 36.0 30.2 20.5 12.8 27.3 Maximum 29.8 34.3 41.4 48.9 59.4 67.3 73.6 73.5 63.1 52.5 37.5 31.2 51.0 Mean 19.4 23.4 29.7 37.6 46.7 53.9 58.9 58.4 49.6 41.4 29.0 22.0 39.2 Precip. 3.07 2.14 2.10 1.79 2.69 2.91 1.69 1.92 1.78 2.01 3.08 3.08 28.26 HDD 1414 1165 1094 822 569 338 204 232 468 733 1081 1333 9453 CDD 0 0 0 0 0 3 12 28 5 0 0 0 48 City:EKALAKA State:MT Lat:45.53N Long:104.33W Elev: 3425 ID:242689 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 8.0 13.8 20.9 30.9 41.1 50.4 55.9 55.0 44.1 33.5 20.6 11.3 32.1 Maximum 29.8 35.9 45.1 57.5 68.3 77.7 85.5 84.4 72.7 59.4 41.7 32.9 57.6 Mean 18.9 24.9 33.0 44.2 54.7 64.1 70.7 69.7 58.4 46.5 31.2 22.1 44.9 Precip. 0.59 0.51 0.81 1.85 2.69 3.16 1.90 1.27 1.52 1.59 0.79 0.57 17.25 HDD 1429 1124 992 624 336 127 41 61 247 576 1016 1331 7904 CDD 0 0 0 0 16 99 218 206 49 0 0 0 588 City:ENNIS State:MT Lat:45.21N Long:111.43W Elev: 4953 ID:242793 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 14.9 17.8 23.1 28.5 35.7 42.2 46.6 45.1 37.4 30.7 22.6 15.8 30.0 Maximum 33.3 38.9 46.4 56.1 65.4 74.5 82.4 81.5 71.3 59.4 42.1 33.6 57.1 Mean 24.1 28.4 34.8 42.3 50.6 58.4 64.5 63.3 54.4 45.1 32.4 24.7 43.6 Precip. 0.46 0.45 0.88 1.30 2.19 2.28 1.37 1.36 1.19 1.02 0.61 0.47 13.58 HDD 1269 1026 938 680 449 218 93 112 329 620 980 1249 7963 CDD 0 0 0 0 0 19 77 59 9 0 0 0 164 City:ETHRIDGE State:MT Lat:48.33N Long:112.08W Elev: 3544 ID:242820 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.29 0.22 0.48 0.92 1.88 2.27 1.44 1.57 0.88 0.54 0.31 0.24 11.04 City:EUREKA RANGER STN State:MT Lat:48.54N Long:115.04W Elev: 2532 ID:242827 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 15.3 20.3 27.0 33.0 40.5 46.6 49.9 48.8 40.7 32.6 25.8 18.0 33.2 Maximum 29.7 37.9 48.8 59.5 68.8 76.1 84.2 84.1 72.9 57.7 39.9 30.7 57.5 Mean 22.5 29.1 37.9 46.3 54.7 61.4 67.1 66.5 56.8 45.2 32.9 24.4 45.4 Precip. 1.14 0.78 0.78 0.93 1.85 2.10 1.50 1.26 1.07 0.99 1.27 1.15 14.82 HDD 1317 1005 841 564 326 156 67 68 275 616 964 1260 7459 CDD 0 0 0 0 5 47 131 113 29 0 0 0 325 City:FAIRFIELD State:MT Lat:47.37N Long:111.59W Elev: 3983 ID:242857 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 11.3 15.1 21.9 30.7 39.9 47.2 51.1 50.8 42.1 33.1 21.6 14.7 31.6 Maximum 31.7 37.6 45.4 54.9 64.1 72.1 78.7 79.6 69.6 58.5 41.5 34.3 55.7 Mean 21.5 26.4 33.7 42.8 52.0 59.7 64.9 65.2 55.9 45.8 31.6 24.5 43.7 Precip. 0.38 0.29 0.59 1.11 2.39 2.07 1.54 1.55 1.19 0.69 0.37 0.33 12.50 HDD 1350 1082 972 666 404 191 94 116 309 595 1004 1256 8039 CDD 0 0 0 0 2 30 91 122 34 0 0 0 279 City:FISHTAIL State:MT Lat:45.27N Long:109.30W Elev: 4500 ID:242996 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.63 0.59 1.15 2.02 3.73 2.70 1.59 1.41 1.62 1.76 0.88 0.81 18.89 City:FLATWILLOW 4 ENE State:MT Lat:46.51N Long:108.19W Elev: 3138 ID:243013 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 9.2 13.9 21.5 29.8 38.6 47.5 52.0 50.7 41.2 32.2 20.0 11.5 30.7 Maximum 34.8 41.0 49.3 59.8 69.4 78.4 85.8 85.7 74.5 62.8 45.7 37.1 60.4 Mean 22.0 27.5 35.4 44.8 54.0 63.0 68.9 68.2 57.9 47.5 32.9 24.3 45.5 Precip. 0.57 0.34 0.70 1.19 2.64 2.32 1.46 1.25 0.98 0.89 0.48 0.48 13.30 HDD 1334 1051 918 606 346 129 47 73 256 543 964 1261 7528 CDD 0 0 0 0 5 66 167 172 40 0 0 0 450 City:FORKS 4 NNE State:MT Lat:48.47N Long:107.27W Elev: 2599 ID:243089 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 1.3 8.5 19.4 30.5 40.8 48.7 53.2 52.5 42.0 31.7 17.3 5.5 29.3 Maximum 23.5 31.7 43.9 59.0 70.0 78.0 84.7 85.5 73.6 59.7 39.6 27.4 56.4 Mean 12.4 20.1 31.7 44.8 55.4 63.4 69.0 69.0 57.8 45.7 28.5 16.5 42.9 Precip. 0.31 0.30 0.53 0.66 2.13 2.51 2.15 1.18 1.07 0.63 0.46 0.36 12.29 HDD 1630 1258 1034 607 312 128 47 75 265 599 1098 1506 8559 CDD 0 0 0 0 15 79 170 198 49 0 0 0 511 City:FORSYTH State:MT Lat:46.16N Long:106.41W Elev: 2515 ID:243098 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 8.3 14.5 23.8 33.6 43.4 52.2 57.0 55.4 44.9 34.1 21.5 11.4 33.3 Maximum 32.7 40.6 50.7 62.3 72.1 81.4 88.8 87.6 76.0 63.2 45.3 34.8 61.3 Mean 20.5 27.6 37.3 48.0 57.8 66.8 72.9 71.5 60.5 48.7 33.4 23.1 47.3 Precip. 0.47 0.39 0.81 1.41 2.35 2.21 1.43 1.12 1.45 1.17 0.74 0.53 14.08 HDD 1379 1051 860 512 250 81 18 35 190 507 948 1298 7129 CDD 0 0 0 1 25 134 262 237 54 0 0 0 713 City:FORT ASSINNIBOINE State:MT Lat:48.30N Long:109.48W Elev: 2613 ID:243110 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 3.4 10.8 20.3 31.7 41.3 49.4 53.4 52.6 42.0 30.8 18.2 8.2 30.2 Maximum 24.5 33.0 44.8 58.5 68.4 77.9 84.3 85.0 72.6 59.4 40.3 29.4 56.5 Mean 14.0 21.9 32.6 45.1 54.9 63.7 68.9 68.8 57.3 45.1 29.3 18.8 43.4 Precip. 0.48 0.33 0.66 0.99 2.18 2.29 1.77 1.33 1.23 0.77 0.48 0.51 13.02 HDD 1583 1207 1006 598 327 114 44 70 272 618 1073 1432 8344 CDD 0 0 0 1 12 75 163 187 40 0 0 0 478 City:FORT BENTON State:MT Lat:47.49N Long:110.40W Elev: 2636 ID:243113 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 10.1 14.7 23.3 32.0 41.3 48.8 52.6 51.7 41.7 32.4 21.2 13.2 31.9 Maximum 35.1 41.4 51.1 62.8 71.8 79.3 86.6 85.8 75.4 64.3 46.6 37.3 61.5 Mean 22.6 28.1 37.2 47.4 56.6 64.1 69.6 68.8 58.6 48.4 33.9 25.3 46.7 Precip. 0.55 0.39 0.85 1.21 2.30 2.45 1.33 1.52 1.23 0.80 0.54 0.52 13.69 HDD 1315 1042 862 532 274 102 33 64 235 517 934 1233 7143 CDD 0 0 0 3 12 73 175 180 42 0 0 0 485 City:FORTINE 1 N State:MT Lat:48.47N Long:114.55W Elev: 3000 ID:243139 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 13.8 19.0 25.1 30.7 37.4 43.8 47.1 46.4 37.8 30.1 23.7 16.0 30.9 Maximum 28.9 36.8 46.9 57.8 66.8 74.2 81.9 81.9 70.7 56.2 38.2 29.4 55.8 Mean 21.4 27.9 36.0 44.3 52.1 59.0 64.5 64.2 54.3 43.2 31.0 22.7 43.4 Precip. 1.10 0.77 0.89 1.15 1.86 2.26 1.74 1.26 1.19 0.91 1.33 1.25 15.71 HDD 1353 1039 899 623 401 203 103 96 332 678 1021 1312 8060 CDD 0 0 0 0 1 22 87 68 10 0 0 0 188 City:FORT LOGAN 4 ESE State:MT Lat:46.39N Long:111.06W Elev: 4710 ID:243157 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.33 0.21 0.51 0.88 2.07 1.92 1.53 1.25 1.12 0.60 0.34 0.32 11.08 City:FORT PECK POWER PLANT State:MT Lat:48.01N Long:106.25W Elev: 2070 ID:243176 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 4.7 12.1 22.2 33.2 43.9 52.7 56.9 56.0 45.5 36.3 22.2 9.9 33.0 Maximum 25.7 33.6 45.7 60.1 71.7 81.3 87.8 87.3 74.8 61.7 42.7 31.0 58.6 Mean 15.2 22.9 34.0 46.7 57.8 67.0 72.4 71.7 60.2 49.0 32.5 20.5 45.8 Precip. 0.29 0.19 0.40 0.93 1.80 2.18 2.16 1.23 1.13 0.81 0.30 0.29 11.71 HDD 1543 1181 963 553 253 69 16 40 206 496 977 1381 7678 CDD 0 0 0 2 30 129 244 246 60 0 0 0 711 City:GALATA 16 SSW State:MT Lat:48.15N Long:111.24W Elev: 3100 ID:243346 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.46 0.33 0.71 1.07 2.08 2.05 1.39 1.48 1.02 0.67 0.47 0.43 12.16 City:GALLATIN GATEWAY 10SSW State:MT Lat:45.27N Long:111.14W Elev: 5480 ID:243366 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 1.08 0.92 1.89 2.44 3.73 3.02 1.53 1.82 2.02 2.01 1.18 1.10 22.74 City:GARDINER State:MT Lat:45.02N Long:110.42W Elev: 5275 ID:243378 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 14.3 18.3 24.5 31.4 39.3 46.5 52.5 51.5 42.4 33.9 22.8 15.3 32.7 Maximum 32.7 38.5 46.8 57.0 66.6 76.5 84.9 83.9 73.3 60.2 41.3 32.2 57.8 Mean 23.5 28.4 35.7 44.2 53.0 61.5 68.7 67.7 57.9 47.1 32.1 23.8 45.3 Precip. 0.37 0.33 0.63 0.61 1.70 1.35 1.21 0.88 0.94 0.71 0.67 0.46 9.86 HDD 1287 1025 912 623 379 160 48 55 247 556 989 1279 7560 CDD 0 0 0 0 4 54 162 138 33 0 0 0 391 City:GERALDINE State:MT Lat:47.36N Long:110.16W Elev: 3130 ID:243445 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 11.4 16.2 24.0 32.5 41.8 49.6 53.7 53.3 43.9 34.6 23.0 14.6 33.2 Maximum 34.2 39.9 48.2 58.6 68.2 76.9 84.6 84.7 73.3 61.4 44.6 36.4 59.3 Mean 22.8 28.1 36.1 45.6 55.0 63.3 69.2 69.0 58.6 48.0 33.8 25.5 46.3 Precip. 0.75 0.49 1.01 1.37 2.78 2.52 1.85 1.66 1.40 0.89 0.64 0.68 16.04 HDD 1309 1035 897 583 320 115 44 64 241 527 936 1225 7296 CDD 0 0 0 0 8 63 172 188 49 0 0 0 480 City:GIBSON 2 NE State:MT Lat:46.02N Long:109.30W Elev: 4350 ID:243486 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.44 0.47 1.03 1.71 2.68 2.36 1.63 1.55 1.46 1.13 0.69 0.55 15.70 City:GIBSON DAM State:MT Lat:47.36N Long:112.45W Elev: 4590 ID:243489 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 10.5 14.5 19.5 26.7 35.0 41.9 45.8 44.9 36.3 29.6 20.4 13.9 28.3 Maximum 31.6 36.4 42.0 50.4 59.3 67.6 75.8 76.1 66.1 55.1 39.1 32.9 52.7 Mean 21.1 25.5 30.8 38.6 47.2 54.8 60.8 60.5 51.2 42.4 29.8 23.4 40.5 Precip. 0.89 0.70 0.83 1.45 2.97 2.82 1.60 1.82 1.43 1.04 0.87 0.86 17.28 HDD 1363 1108 1062 794 554 313 163 180 420 703 1058 1289 9007 CDD 0 0 0 0 0 6 32 41 6 0 0 0 85 City:GILDFORD State:MT Lat:48.34N Long:110.18W Elev: 2820 ID:243530 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 4.9 11.0 20.1 30.0 39.9 47.7 51.4 50.6 40.5 30.4 17.7 8.2 29.4 Maximum 27.8 34.9 45.4 58.5 68.8 76.7 84.0 83.4 71.7 59.3 41.0 31.2 56.9 Mean 16.4 23.0 32.8 44.3 54.4 62.2 67.7 67.0 56.1 44.9 29.4 19.7 43.2 Precip. 0.33 0.21 0.48 0.78 2.01 2.17 1.39 1.30 1.10 0.60 0.36 0.33 11.06 HDD 1507 1178 1000 622 335 142 50 92 294 625 1070 1405 8320 CDD 0 0 0 0 4 58 134 155 26 0 0 0 377 City:GLASGOW 14 NW State:MT Lat:48.21N Long:106.51W Elev: 2150 ID:243554 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.31 0.22 0.31 0.53 2.02 2.42 1.75 1.07 0.99 0.55 0.34 0.32 10.83 City:GLASGOW INTL AP State:MT Lat:48.13N Long:106.37W Elev: 2294 ID:243558 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 1.8 9.9 20.6 32.2 43.0 51.6 56.6 55.7 44.1 33.0 18.5 6.4 31.1 Maximum 19.9 28.3 41.3 56.7 67.9 77.1 83.8 83.3 70.4 57.1 37.4 24.8 54.0 Mean 10.8 19.1 30.9 44.5 55.5 64.4 70.2 69.5 57.3 45.0 27.9 15.6 42.6 Precip. 0.35 0.26 0.47 0.75 1.72 2.20 1.78 1.25 0.98 0.71 0.39 0.37 11.23 HDD 1671 1290 1055 610 308 91 22 38 253 609 1088 1506 8541 CDD 0 0 0 1 17 80 185 182 28 1 0 0 494 City:GLEN 2 E State:MT Lat:45.28N Long:112.39W Elev: 4960 ID:243570 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 6.7 10.9 18.6 25.6 33.7 39.8 43.4 40.9 32.4 24.3 14.4 6.8 24.8 Maximum 35.2 40.9 48.5 57.4 65.7 74.7 83.8 83.1 73.0 61.4 44.1 35.3 58.6 Mean 21.0 25.9 33.6 41.5 49.7 57.3 63.6 62.0 52.7 42.9 29.3 21.1 41.7 Precip. 0.24 0.18 0.42 0.68 1.67 1.82 1.08 1.24 0.90 0.48 0.34 0.17 9.22 HDD 1366 1095 976 705 476 249 118 141 377 687 1072 1362 8624 CDD 0 0 0 0 0 16 75 47 8 0 0 0 146 City:GLENDIVE State:MT Lat:47.06N Long:104.43W Elev: 2076 ID:243581 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 3.6 10.7 20.2 31.7 43.7 53.3 58.3 55.9 44.4 33.7 20.2 8.7 32.0 Maximum 25.3 33.7 44.9 58.9 70.4 80.2 87.3 87.0 74.4 61.2 41.0 29.3 57.8 Mean 14.5 22.2 32.6 45.3 57.1 66.8 72.8 71.5 59.4 47.5 30.6 19.0 44.9 Precip. 0.41 0.33 0.57 1.17 2.08 2.50 1.80 1.44 1.43 1.00 0.49 0.40 13.62 HDD 1568 1198 1007 592 275 91 25 49 221 545 1032 1426 8029 CDD 0 0 0 0 28 144 266 248 53 0 0 0 739 City:GOLDBUTTE 7 N State:MT Lat:48.59N Long:111.24W Elev: 3498 ID:243617 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 8.1 12.6 20.4 29.2 37.7 44.6 48.3 47.5 39.2 31.0 19.1 11.4 29.1 Maximum 31.4 36.1 44.2 56.0 65.4 72.9 79.9 79.6 68.7 57.3 40.9 33.3 55.5 Mean 19.8 24.4 32.3 42.6 51.6 58.8 64.1 63.6 54.0 44.2 30.0 22.4 42.3 Precip. 0.42 0.33 0.70 1.10 2.17 2.63 1.45 1.76 1.46 0.74 0.51 0.42 13.69 HDD 1403 1138 1015 673 419 210 105 143 351 647 1051 1323 8478 CDD 0 0 0 0 1 21 76 97 19 0 0 0 214 City:GRANT 5 SE State:MT Lat:44.56N Long:113.02W Elev: 5780 ID:243707 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.40 0.27 0.62 1.00 1.78 1.64 1.12 1.05 0.87 0.69 0.47 0.41 10.32 City:GRASS RANGE State:MT Lat:47.02N Long:108.48W Elev: 3490 ID:243727 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 10.9 15.6 22.5 30.6 39.3 46.8 51.0 50.3 41.0 32.4 20.7 13.5 31.2 Maximum 34.7 39.9 46.9 56.6 65.8 74.7 81.4 81.6 70.6 59.8 44.2 36.9 57.8 Mean 22.8 27.8 34.7 43.6 52.6 60.8 66.2 66.0 55.8 46.1 32.5 25.2 44.5 Precip. 0.79 0.31 0.99 1.44 3.08 2.81 2.06 1.59 1.27 0.92 0.61 0.64 16.51 HDD 1309 1043 938 641 389 169 87 108 304 586 977 1235 7786 CDD 0 0 0 0 3 41 124 137 28 0 0 0 333 City:GREAT FALLS INTL AP State:MT Lat:47.28N Long:111.23W Elev: 3664 ID:243751 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 11.3 15.1 21.5 29.7 38.3 46.0 50.4 49.9 41.2 33.0 22.5 14.4 31.1 Maximum 32.1 37.7 45.3 55.6 64.7 73.9 82.0 81.2 69.6 58.0 42.1 34.2 56.4 Mean 21.7 26.4 33.4 42.6 51.5 60.0 66.2 65.6 55.4 45.5 32.3 24.3 43.8 Precip. 0.68 0.51 1.01 1.40 2.53 2.24 1.45 1.65 1.23 0.93 0.59 0.67 14.89 HDD 1323 1063 948 639 389 158 48 64 275 579 952 1237 7675 CDD 0 0 0 1 7 47 126 121 22 2 0 0 326 City:HAMILTON State:MT Lat:46.14N Long:114.10W Elev: 3529 ID:243885 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 16.8 20.2 26.3 32.2 39.2 45.3 49.3 48.1 40.1 31.0 23.2 16.9 32.4 Maximum 34.4 40.8 49.7 57.9 66.3 74.2 82.8 82.0 71.0 58.7 42.3 34.0 57.8 Mean 25.6 30.5 38.0 45.1 52.8 59.8 66.1 65.1 55.6 44.9 32.8 25.5 45.2 Precip. 1.11 0.86 0.91 1.05 1.75 1.62 1.00 1.14 1.07 0.78 1.11 1.14 13.54 HDD 1222 966 838 598 383 184 83 95 305 625 967 1228 7494 CDD 0 0 0 0 3 27 114 97 21 0 0 0 262 City:HARB State:MT Lat:48.14N Long:107.25W Elev: 2510 ID:243910 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.25 0.19 0.41 0.71 1.86 1.98 1.87 1.05 0.87 0.52 0.27 0.33 10.31 City:HARDIN State:MT Lat:45.44N Long:107.37W Elev: 2905 ID:243915 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 10.9 15.9 24.2 33.3 42.5 50.3 55.4 54.1 43.7 33.6 22.1 13.2 33.3 Maximum 35.4 42.7 52.2 63.0 73.0 82.5 90.7 90.2 78.6 65.3 47.2 37.2 63.2 Mean 23.2 29.3 38.2 48.2 57.8 66.4 73.1 72.2 61.2 49.5 34.7 25.2 48.3 Precip. 0.61 0.35 0.67 1.37 1.98 1.66 1.14 0.65 1.28 1.29 0.60 0.47 12.07 HDD 1297 999 831 505 247 84 21 35 176 484 912 1234 6825 CDD 0 0 0 1 23 125 271 256 60 0 0 0 736 City:HARLEM 4 W State:MT Lat:48.33N Long:108.52W Elev: 2362 ID:243929 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 1.2 8.3 18.9 29.2 39.5 47.9 51.5 50.2 39.2 28.7 15.1 4.6 27.9 Maximum 26.0 34.7 46.6 60.4 70.4 78.9 85.2 84.9 73.2 60.7 41.3 30.0 57.7 Mean 13.6 21.5 32.8 44.8 55.0 63.4 68.4 67.6 56.2 44.7 28.2 17.3 42.8 Precip. 0.41 0.32 0.38 0.73 1.96 2.20 1.81 1.02 1.35 0.55 0.39 0.41 11.53 HDD 1593 1218 1000 606 328 116 47 91 294 629 1105 1478 8505 CDD 0 0 0 0 16 68 151 169 29 0 0 0 433 City:HARLOWTON State:MT Lat:46.26N Long:109.50W Elev: 4162 ID:243939 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 11.6 15.0 20.7 28.4 36.7 44.4 48.2 47.1 38.3 30.0 20.3 13.7 29.5 Maximum 34.6 40.2 47.5 57.3 66.7 75.9 83.4 83.2 72.5 60.6 43.3 35.7 58.4 Mean 23.1 27.6 34.1 42.9 51.7 60.2 65.8 65.2 55.4 45.3 31.8 24.7 44.0 Precip. 0.45 0.39 0.73 1.30 2.22 2.71 1.74 1.61 1.15 0.77 0.52 0.49 14.08 HDD 1299 1047 957 665 413 179 79 102 306 612 996 1250 7905 CDD 0 0 0 0 1 34 105 105 17 0 0 0 262 City:HAUGAN 3 E (DEBORGIA) State:MT Lat:47.23N Long:115.21W Elev: 3100 ID:243984 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 13.3 17.4 23.4 28.6 35.2 40.9 43.5 42.0 35.5 28.2 23.1 15.5 28.9 Maximum 31.4 38.2 46.6 57.2 66.0 73.4 81.8 82.7 72.3 57.5 38.9 31.1 56.4 Mean 22.4 27.8 35.0 42.9 50.6 57.2 62.7 62.4 53.9 42.9 31.0 23.3 42.7 Precip. 3.88 2.83 1.90 1.54 1.94 2.16 1.16 1.25 1.45 1.94 3.48 3.61 27.14 HDD 1322 1042 930 663 446 240 122 133 338 686 1021 1293 8236 CDD 0 0 0 0 0 5 50 51 6 0 0 0 112 City:HAVRE CITY CO AP State:MT Lat:48.33N Long:109.46W Elev: 2585 ID:243996 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 3.7 10.4 20.0 30.0 40.2 48.0 52.0 51.3 40.7 29.8 17.3 7.8 29.3 Maximum 25.5 33.4 44.9 58.5 68.8 77.4 84.6 83.9 71.9 59.4 40.8 30.1 56.6 Mean 14.6 21.9 32.5 44.3 54.5 62.7 68.3 67.6 56.3 44.6 29.1 19.0 43.0 Precip. 0.47 0.36 0.70 0.87 1.84 1.90 1.51 1.20 1.03 0.62 0.45 0.51 11.46 HDD 1546 1201 999 613 324 113 33 49 270 622 1067 1410 8247 CDD 0 0 0 1 10 59 146 141 19 1 0 0 377 City:HAXBY 18 SW State:MT Lat:47.34N Long:106.42W Elev: 2651 ID:244007 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 4.0 10.9 19.9 29.3 39.6 48.4 52.5 51.5 40.8 31.0 18.0 7.4 29.4 Maximum 28.8 36.4 46.6 59.2 70.2 79.5 86.6 86.4 74.3 61.4 42.5 32.7 58.7 Mean 16.4 23.7 33.3 44.3 54.9 64.0 69.6 69.0 57.6 46.2 30.3 20.1 44.1 Precip. 0.38 0.23 0.50 0.90 2.29 2.31 1.69 1.40 1.36 0.84 0.45 0.49 12.84 HDD 1506 1158 984 623 326 125 42 62 259 583 1043 1394 8105 CDD 0 0 0 0 13 93 183 183 34 0 0 0 506 City:HEBGEN DAM State:MT Lat:44.52N Long:111.20W Elev: 6489 ID:244038 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 2.7 5.1 13.1 22.9 31.9 38.7 43.5 42.9 35.5 28.0 17.2 4.6 23.8 Maximum 21.4 27.1 36.3 45.9 57.8 68.2 76.9 76.6 66.4 52.1 32.7 21.5 48.6 Mean 12.1 16.1 24.7 34.4 44.9 53.5 60.2 59.8 51.0 40.1 25.0 13.1 36.2 Precip. 3.07 2.40 2.61 1.83 2.97 3.13 2.00 1.88 1.87 1.72 2.57 3.25 29.30 HDD 1642 1369 1250 918 626 349 172 181 424 775 1201 1610 10517 CDD 0 0 0 0 0 3 22 17 3 0 0 0 45 City:HELENA AP State:MT Lat:46.36N Long:111.58W Elev: 3828 ID:244055 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 9.9 15.6 23.5 31.2 39.8 47.5 52.3 50.8 41.2 31.2 20.3 11.3 31.2 Maximum 30.5 37.3 46.8 56.9 65.9 75.0 83.4 82.5 71.0 58.4 41.5 31.5 56.7 Mean 20.2 26.4 35.1 44.1 52.9 61.2 67.8 66.7 56.1 44.8 30.9 21.4 44.0 Precip. 0.52 0.38 0.63 0.91 1.78 1.82 1.34 1.29 1.05 0.66 0.48 0.46 11.32 HDD 1397 1093 932 634 384 157 42 56 283 631 1018 1348 7975 CDD 0 0 0 0 3 39 122 100 13 0 0 0 277 City:HERON 2 NW State:MT Lat:48.04N Long:115.59W Elev: 2240 ID:244084 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 19.8 22.6 26.7 31.8 38.3 43.9 46.6 45.7 39.5 32.6 28.0 21.3 33.1 Maximum 31.7 37.3 46.1 57.4 66.4 73.2 80.6 80.3 69.6 55.1 39.2 31.9 55.7 Mean 25.8 30.0 36.4 44.6 52.4 58.6 63.6 63.0 54.6 43.9 33.6 26.6 44.4 Precip. 4.27 3.38 2.68 2.22 2.81 2.62 1.46 1.35 1.72 2.24 4.55 4.46 33.76 HDD 1217 981 886 612 394 207 104 118 322 656 942 1190 7629 CDD 0 0 0 0 1 13 62 56 8 0 0 0 140 City:HIGHWOOD 7 NE State:MT Lat:47.39N Long:110.40W Elev: 3600 ID:244133 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.66 0.46 1.06 1.52 3.15 3.15 1.73 1.75 1.53 1.07 0.65 0.76 17.49 City:HINGHAM 12 N State:MT Lat:48.44N Long:110.27W Elev: 2930 ID:244174 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.23 0.17 0.38 0.64 1.73 2.09 1.29 1.18 1.13 0.59 0.29 0.20 9.92 City:HINSDALE 4 SW State:MT Lat:48.21N Long:107.09W Elev: 2675 ID:244180 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 6.0 12.8 22.3 33.1 43.4 51.7 56.8 55.8 45.3 35.0 21.3 10.0 32.8 Maximum 20.9 28.5 40.6 55.8 67.5 76.5 83.0 82.6 69.6 56.1 36.5 25.0 53.6 Mean 13.5 20.7 31.5 44.5 55.5 64.1 69.9 69.2 57.5 45.6 28.9 17.5 43.2 Precip. 0.42 0.35 0.74 1.23 2.74 2.85 1.89 1.50 1.45 0.90 0.64 0.45 15.16 HDD 1599 1242 1039 618 312 115 43 77 279 604 1083 1472 8483 CDD 0 0 0 1 17 88 194 207 52 0 0 0 559 City:HOLTER DAM State:MT Lat:46.59N Long:112.01W Elev: 3487 ID:244241 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 18.8 22.3 27.7 34.6 42.3 49.6 53.7 53.2 45.6 39.5 30.0 22.1 36.6 Maximum 35.8 40.9 48.3 57.9 67.4 76.4 84.5 84.5 72.8 60.6 45.0 37.5 59.3 Mean 27.3 31.6 38.0 46.3 54.9 63.0 69.1 68.9 59.2 50.1 37.5 29.8 48.0 Precip. 0.41 0.27 0.51 1.24 2.35 1.89 1.45 1.37 1.22 0.78 0.39 0.34 12.22 HDD 1169 935 836 563 322 135 42 49 213 464 825 1091 6644 CDD 0 0 0 0 7 75 169 168 38 0 0 0 457 City:HUNGRY HORSE DAM State:MT Lat:48.21N Long:114.01W Elev: 3160 ID:244328 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 16.0 18.6 24.3 31.7 39.6 45.9 50.3 49.6 40.8 32.8 25.3 18.5 32.8 Maximum 29.5 34.5 42.9 53.7 63.9 72.0 80.1 79.9 66.5 52.2 37.3 30.7 53.6 Mean 22.8 26.6 33.6 42.7 51.8 59.0 65.2 64.8 53.7 42.5 31.3 24.6 43.2 Precip. 3.36 2.56 2.46 2.38 3.15 3.51 2.23 1.91 2.66 2.83 3.97 3.80 34.82 HDD 1310 1076 974 669 413 212 109 111 355 697 1011 1253 8190 CDD 0 0 0 0 3 31 114 103 14 0 0 0 265 City:HUNTLEY EXPERIMENT STN State:MT Lat:45.55N Long:108.15W Elev: 3000 ID:244345 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 6.7 12.6 20.7 29.7 39.1 47.6 52.0 50.4 39.8 29.0 17.4 8.8 29.5 Maximum 33.9 41.4 50.7 61.0 69.9 79.5 86.9 86.7 75.4 63.5 46.6 36.6 61.0 Mean 20.3 27.0 35.7 45.4 54.5 63.6 69.5 68.6 57.6 46.3 32.0 22.7 45.3 Precip. 0.59 0.48 0.91 1.60 2.37 1.89 1.47 1.05 1.42 1.15 0.63 0.61 14.17 HDD 1385 1064 908 590 331 115 38 54 249 581 991 1310 7616 CDD 0 0 0 0 6 72 176 164 27 0 0 0 445 City:HYSHAM State:MT Lat:46.18N Long:107.14W Elev: 2660 ID:244358 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 9.5 14.9 23.6 32.9 42.7 51.7 56.3 55.1 44.7 34.4 22.3 12.9 33.4 Maximum 31.9 39.4 49.8 60.8 70.1 79.4 86.3 85.5 74.4 62.0 43.9 34.2 59.8 Mean 20.7 27.2 36.7 46.9 56.4 65.6 71.3 70.3 59.6 48.2 33.1 23.6 46.6 Precip. 0.51 0.34 0.82 1.31 2.52 1.93 1.48 0.93 1.40 1.19 0.59 0.46 13.48 HDD 1373 1060 878 545 284 87 25 41 207 520 957 1286 7263 CDD 0 0 0 1 17 103 219 205 44 0 0 0 589 City:HYSHAM 25 SSE State:MT Lat:45.56N Long:107.08W Elev: 3100 ID:244364 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 5.4 12.2 21.5 30.2 39.0 47.4 51.9 50.3 40.0 29.4 18.1 8.6 29.5 Maximum 31.7 38.2 47.4 57.9 68.0 78.3 87.1 87.2 74.3 61.1 44.0 34.8 59.2 Mean 18.6 25.2 34.5 44.1 53.5 62.9 69.5 68.8 57.2 45.3 31.1 21.7 44.4 Precip. 0.65 0.50 0.93 1.37 2.22 2.36 1.49 0.87 1.32 1.29 0.75 0.62 14.37 HDD 1441 1114 949 629 363 144 44 65 268 613 1019 1342 7991 CDD 0 0 0 0 6 79 184 181 32 0 0 0 482 City:ILIAD State:MT Lat:47.48N Long:109.49W Elev: 2965 ID:244368 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 6.3 13.5 22.2 32.3 41.0 49.0 53.0 52.3 41.4 30.6 18.5 9.4 30.8 Maximum 28.4 36.1 46.4 58.3 68.1 77.0 84.2 84.1 72.3 59.5 41.6 31.5 57.3 Mean 17.4 24.8 34.3 45.3 54.6 63.0 68.6 68.2 56.9 45.1 30.1 20.5 44.1 Precip. 0.58 0.43 0.68 1.15 2.34 2.28 1.57 1.36 1.14 0.67 0.48 0.41 13.09 HDD 1476 1125 953 590 327 123 52 73 285 618 1050 1381 8053 CDD 0 0 0 0 4 64 163 172 41 0 0 0 444 City:INGOMAR 14 NE State:MT Lat:46.44N Long:107.12W Elev: 2795 ID:244386 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 3.9 11.0 20.6 30.4 40.3 49.6 54.6 52.9 41.2 29.9 16.7 6.7 29.8 Maximum 31.0 38.5 48.8 60.7 70.7 80.1 88.3 87.8 75.8 62.6 43.9 34.0 60.2 Mean 17.5 24.8 34.7 45.6 55.5 64.9 71.5 70.4 58.5 46.3 30.3 20.4 45.0 Precip. 0.44 0.28 0.52 1.07 2.26 2.30 1.49 0.91 1.27 0.81 0.48 0.47 12.30 HDD 1475 1127 938 584 310 107 27 54 238 580 1041 1385 7866 CDD 0 0 0 0 14 102 225 220 43 0 0 0 604 City:JACKSON State:MT Lat:45.22N Long:113.25W Elev: 6480 ID:244447 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 6.4 7.8 14.2 21.4 29.3 35.2 39.0 37.7 30.4 23.9 14.2 6.6 22.2 Maximum 28.0 32.6 39.8 48.1 57.0 66.6 74.9 75.7 65.2 52.8 36.5 27.6 50.4 Mean 17.2 20.2 27.0 34.8 43.2 50.9 57.0 56.7 47.8 38.4 25.4 17.1 36.3 Precip. 0.61 0.47 0.74 1.02 1.68 1.75 1.19 1.17 1.03 0.87 0.72 0.54 11.79 HDD 1482 1255 1178 907 678 424 261 269 517 826 1189 1485 10471 CDD 0 0 0 0 0 1 11 11 0 0 0 0 23 City:JOLIET State:MT Lat:45.29N Long:108.59W Elev: 3700 ID:244506 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 9.6 15.1 23.0 30.4 39.5 47.3 52.6 50.8 41.1 31.0 20.2 11.9 31.0 Maximum 33.8 40.2 48.9 57.6 67.8 77.9 84.8 83.8 72.5 60.6 44.0 35.7 59.0 Mean 21.7 27.7 36.0 44.0 53.7 62.6 68.7 67.3 56.8 45.8 32.1 23.8 45.0 Precip. 0.74 0.63 1.27 1.96 2.96 1.72 1.10 1.08 1.42 1.55 0.70 0.64 15.77 HDD 1343 1047 902 630 356 131 42 66 275 595 989 1277 7653 CDD 0 0 0 0 4 59 158 136 28 0 0 0 385 City:JOPLIN State:MT Lat:48.34N Long:110.46W Elev: 3325 ID:244512 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 6.3 11.6 20.7 30.0 39.2 46.5 50.7 50.2 40.1 30.9 18.2 9.5 29.5 Maximum 28.4 34.7 44.5 57.4 67.8 75.6 83.2 82.8 71.6 59.3 40.7 30.9 56.4 Mean 17.4 23.2 32.6 43.7 53.5 61.1 67.0 66.5 55.9 45.1 29.5 20.2 43.0 Precip. 0.25 0.18 0.42 0.69 1.99 2.01 1.21 1.25 0.88 0.46 0.29 0.23 9.86 HDD 1477 1172 1004 639 362 162 62 97 308 616 1067 1388 8354 CDD 0 0 0 0 4 43 122 144 34 0 0 0 347 City:JORDAN State:MT Lat:47.19N Long:106.55W Elev: 2640 ID:244522 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 0.7 8.4 18.7 29.8 40.0 49.9 54.3 52.5 39.6 29.3 15.1 5.3 28.6 Maximum 27.4 36.1 47.8 59.9 70.3 80.9 88.4 88.3 75.6 62.6 42.7 31.4 59.3 Mean 14.1 22.3 33.3 44.9 55.2 65.4 71.4 70.4 57.6 46.0 28.9 18.4 44.0 Precip. 0.51 0.36 0.61 0.98 2.19 2.27 1.73 1.19 1.23 0.88 0.44 0.51 12.90 HDD 1580 1197 986 604 319 105 28 55 259 591 1084 1446 8254 CDD 0 0 0 0 15 116 226 221 36 0 0 0 614 City:JORDAN 23 ENE State:MT Lat:47.29N Long:106.28W Elev: 2385 ID:244530 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 1.8 10.3 20.4 30.4 40.8 50.0 54.4 52.6 40.4 29.6 16.8 6.0 29.5 Maximum 27.4 35.0 45.9 58.4 69.5 79.6 86.7 86.5 74.1 60.9 42.5 31.6 58.2 Mean 14.6 22.7 33.2 44.4 55.2 64.8 70.6 69.6 57.3 45.3 29.7 18.8 43.9 Precip. 0.29 0.25 0.38 1.08 1.55 1.88 1.81 1.26 1.19 0.71 0.37 0.39 11.16 HDD 1563 1187 988 618 319 114 32 64 269 612 1061 1433 8260 CDD 0 0 0 0 14 107 203 205 37 0 0 0 566 City:JUDITH GAP State:MT Lat:46.41N Long:109.45W Elev: 4690 ID:244538 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.61 0.38 0.85 1.31 2.67 2.82 2.27 1.74 1.26 0.78 0.44 0.52 15.65 City:JUDITH GAP 13 E State:MT Lat:46.40N Long:109.29W Elev: 5100 ID:244545 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 9.0 12.2 17.5 24.9 33.4 41.4 46.6 46.1 37.6 29.2 18.3 11.1 27.3 Maximum 32.8 37.2 43.2 52.7 61.5 69.7 76.8 76.9 66.5 56.3 40.8 33.8 54.0 Mean 20.9 24.7 30.4 38.8 47.5 55.6 61.7 61.5 52.1 42.8 29.6 22.5 40.7 Precip. 0.65 0.43 0.89 1.35 2.41 2.74 2.14 1.70 1.21 0.75 0.50 0.61 15.38 HDD 1367 1129 1074 787 544 298 150 183 401 690 1064 1318 9005 CDD 0 0 0 0 0 15 48 74 13 0 0 0 150 City:KALISPELL GLACIER PK AP State:MT Lat:48.18N Long:114.16W Elev: 2957 ID:244558 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 13.8 18.4 24.8 30.8 37.9 43.5 46.7 45.8 37.1 28.4 23.2 16.1 30.5 Maximum 28.9 35.2 44.9 56.0 64.7 71.9 80.2 80.5 69.0 55.3 38.6 30.1 54.6 Mean 21.4 26.8 34.9 43.4 51.3 57.7 63.5 63.2 53.1 41.9 30.9 23.1 42.6 Precip. 1.47 1.15 1.11 1.22 2.04 2.30 1.41 1.25 1.20 0.96 1.45 1.65 17.21 HDD 1359 1079 933 640 411 213 85 94 341 705 1014 1297 8171 CDD 0 0 0 0 3 17 62 63 4 0 0 0 149 City:KNOBS 4 SW State:MT Lat:45.52N Long:104.10W Elev: 3086 ID:244715 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.35 0.33 0.57 1.39 2.43 3.07 1.74 1.36 1.12 1.30 0.70 0.28 14.64 City:KREMLIN State:MT Lat:48.31N Long:110.06W Elev: 2860 ID:244766 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.39 0.27 0.59 0.90 2.38 2.17 1.52 1.30 1.22 0.69 0.40 0.41 12.24 City:LAKEVIEW State:MT Lat:44.36N Long:111.49W Elev: 6710 ID:244820 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 0.7 4.2 11.8 21.7 30.1 36.0 40.3 39.0 31.6 23.5 12.3 2.2 21.1 Maximum 25.1 30.2 38.5 48.7 59.6 69.1 77.5 77.5 67.9 54.4 35.6 25.9 50.8 Mean 12.9 17.2 25.2 35.2 44.9 52.6 58.9 58.3 49.8 39.0 24.0 14.1 36.0 Precip. 0.88 0.96 1.76 1.54 2.60 2.70 1.87 1.59 1.85 1.44 1.22 1.08 19.49 HDD 1615 1338 1237 894 625 376 205 219 458 808 1232 1579 10586 CDD 0 0 0 0 0 2 17 10 1 0 0 0 30 City:LAME DEER State:MT Lat:45.38N Long:106.40W Elev: 3300 ID:244839 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 3.7 9.2 17.3 25.3 34.7 44.1 48.7 47.0 37.0 27.5 16.2 6.5 26.4 Maximum 37.1 44.4 52.8 63.1 71.9 81.5 90.3 90.3 78.9 65.0 46.8 38.5 63.4 Mean 20.4 26.8 35.1 44.2 53.3 62.8 69.5 68.7 58.0 46.3 31.5 22.5 44.9 Precip. 0.52 0.42 0.86 1.43 2.72 2.40 1.43 0.83 1.25 1.26 0.69 0.53 14.34 HDD 1382 1070 929 624 370 143 35 63 244 581 1005 1317 7763 CDD 0 0 0 0 7 76 173 177 33 0 0 0 466 City:LAUREL 3 WSW State:MT Lat:45.40N Long:108.49W Elev: 3319 ID:244894 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.75 0.45 1.00 1.54 2.64 1.72 1.14 0.95 1.33 1.31 0.61 0.66 14.10 City:LENNEP 5 SW State:MT Lat:46.22N Long:110.36W Elev: 5600 ID:244954 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 8.3 11.1 16.7 23.7 32.1 39.8 43.7 43.0 34.2 26.0 16.2 10.0 25.4 Maximum 27.7 32.2 38.2 47.5 57.4 66.9 74.6 75.3 63.9 52.3 36.2 28.7 50.1 Mean 18.0 21.7 27.5 35.6 44.8 53.4 59.2 59.2 49.1 39.2 26.2 19.4 37.8 Precip. 0.98 0.69 0.97 1.32 2.48 2.64 1.83 1.57 1.35 1.11 0.89 0.90 16.73 HDD 1457 1214 1164 882 628 353 210 214 482 802 1163 1416 9985 CDD 0 0 0 0 0 4 29 32 4 0 0 0 69 City:LEWISTOWN 11 SSE State:MT Lat:46.54N Long:109.25W Elev: 4965 ID:244978 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 1.02 0.75 1.68 2.01 3.62 3.63 2.70 2.39 2.10 1.55 1.01 1.17 23.63 City:LEWISTOWN MUNICIPAL AP State:MT Lat:47.03N Long:109.28W Elev: 4145 ID:244985 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 10.6 14.7 21.3 29.2 37.6 44.9 49.5 49.2 40.4 31.1 20.1 12.6 30.1 Maximum 31.9 36.3 42.9 53.2 62.6 71.5 79.5 79.9 68.7 57.3 42.0 34.2 55.0 Mean 21.3 25.5 32.1 41.2 50.1 58.2 64.5 64.6 54.6 44.2 31.1 23.4 42.6 Precip. 0.89 0.57 1.16 1.38 2.92 2.93 2.10 1.89 1.38 1.06 0.74 0.83 17.85 HDD 1355 1105 1020 715 462 226 106 135 335 645 1018 1291 8413 CDD 0 0 0 0 0 22 90 121 22 0 0 0 255 City:LIBBY DAM BASE State:MT Lat:48.25N Long:115.19W Elev: 2110 ID:245011 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 18.2 20.5 24.9 30.5 38.1 44.2 48.5 48.1 40.2 32.6 26.5 20.4 32.7 Maximum 33.4 39.6 48.7 59.0 68.0 75.3 83.0 83.5 72.1 58.4 41.9 34.2 58.1 Mean 25.8 30.1 36.8 44.8 53.1 59.8 65.8 65.8 56.2 45.5 34.2 27.3 45.4 Precip. 1.20 1.07 1.11 0.96 1.65 1.87 1.27 1.12 1.08 1.36 1.91 1.64 16.24 HDD 1215 979 874 608 373 186 74 82 288 605 925 1170 7379 CDD 0 0 0 0 2 28 97 107 22 0 0 0 256 City:LIBBY 1 NE RS State:MT Lat:48.24N Long:115.32W Elev: 2096 ID:245015 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 18.2 22.2 26.7 31.4 38.5 44.7 48.1 47.1 39.6 32.9 27.6 20.8 33.2 Maximum 33.5 41.3 52.0 62.5 71.6 78.9 86.3 86.8 75.2 59.0 41.0 33.0 60.1 Mean 25.9 31.8 39.4 47.0 55.1 61.8 67.2 67.0 57.4 46.0 34.3 26.9 46.7 Precip. 1.95 1.47 1.31 1.05 1.63 1.68 1.30 1.01 1.02 1.37 2.40 2.21 18.40 HDD 1214 932 796 542 317 142 58 61 252 590 921 1181 7006 CDD 0 0 0 0 8 46 127 121 24 0 0 0 326 City:LIBBY 32 SSE State:MT Lat:47.58N Long:115.14W Elev: 3600 ID:245020 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 11.8 14.9 20.6 26.1 32.1 37.7 39.6 38.3 31.2 24.8 19.6 12.5 25.8 Maximum 30.6 36.6 44.6 55.0 64.1 71.4 78.9 79.3 68.8 55.1 37.7 30.0 54.3 Mean 21.2 25.8 32.6 40.6 48.1 54.6 59.3 58.8 50.0 40.0 28.7 21.3 40.1 Precip. 2.80 2.25 1.84 1.49 2.16 2.23 1.22 1.24 1.30 1.82 3.06 2.94 24.35 HDD 1357 1098 1005 733 523 315 197 213 452 776 1091 1358 9118 CDD 0 0 0 0 0 2 18 19 2 0 0 0 41 City:LIMA State:MT Lat:44.38N Long:112.35W Elev: 6273 ID:245030 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 5.8 9.4 17.0 24.0 31.7 38.6 43.2 41.9 33.9 25.8 15.2 6.9 24.5 Maximum 27.7 33.0 41.6 51.9 61.2 70.8 79.3 78.3 68.7 56.2 37.7 28.1 52.9 Mean 16.8 21.2 29.3 38.0 46.5 54.7 61.3 60.1 51.3 41.0 26.5 17.5 38.7 Precip. 0.41 0.34 0.63 1.10 2.15 1.96 1.54 1.38 1.11 0.92 0.46 0.43 12.43 HDD 1495 1227 1106 810 576 316 158 177 414 745 1157 1473 9654 CDD 0 0 0 0 0 7 41 26 3 0 0 0 77 City:LINCOLN RANGER STN State:MT Lat:46.57N Long:112.39W Elev: 4575 ID:245040 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 10.8 15.5 21.6 27.3 33.7 39.6 42.7 41.1 33.2 27.3 19.6 12.5 27.1 Maximum 30.3 36.2 44.3 54.2 63.5 71.8 80.0 80.5 69.7 56.4 38.6 31.3 54.7 Mean 20.6 25.9 33.0 40.8 48.6 55.7 61.4 60.8 51.5 41.9 29.1 21.9 40.9 Precip. 1.93 1.30 1.09 1.34 2.30 2.00 1.28 1.59 1.29 1.30 1.37 1.98 18.77 HDD 1378 1096 993 728 509 287 156 169 410 719 1078 1337 8860 CDD 0 0 0 0 0 8 42 38 3 0 0 0 91 City:LINDBERGH LAKE State:MT Lat:47.25N Long:113.43W Elev: 4320 ID:245043 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 13.5 16.9 22.6 28.9 36.6 43.3 47.7 47.0 38.9 31.3 22.7 14.7 30.3 Maximum 28.8 34.7 41.9 50.9 60.3 68.1 76.2 76.5 66.1 52.4 35.5 28.5 51.7 Mean 21.2 25.8 32.3 39.9 48.5 55.7 62.0 61.8 52.5 41.9 29.1 21.6 41.0 Precip. 3.11 2.30 1.92 1.69 2.36 2.35 1.37 1.42 1.57 1.83 3.04 3.22 26.18 HDD 1359 1098 1015 754 514 289 154 163 387 718 1077 1344 8872 CDD 0 0 0 0 0 9 59 63 12 0 0 0 143 City:LINDSAY State:MT Lat:47.14N Long:105.09W Elev: 2690 ID:245045 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.46 0.41 0.55 1.19 2.14 2.31 2.05 1.27 1.37 1.03 0.57 0.48 13.83 City:LIVINGSTON 12 S State:MT Lat:45.29N Long:110.34W Elev: 4870 ID:245080 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 14.4 17.8 23.4 29.1 36.8 43.5 48.4 47.3 39.8 32.5 23.5 15.6 31.0 Maximum 32.9 38.6 46.0 55.5 64.1 72.6 80.3 80.0 69.4 57.9 42.3 33.7 56.1 Mean 23.7 28.2 34.7 42.3 50.5 58.1 64.4 63.7 54.6 45.2 32.9 24.7 43.6 Precip. 0.66 0.51 1.10 1.44 2.86 2.70 1.74 1.45 1.71 1.34 0.82 0.62 16.95 HDD 1282 1030 939 682 452 225 101 118 323 614 963 1250 7979 CDD 0 0 0 0 0 16 81 77 12 0 0 0 186 City:LIVINGSTON AP State:MT Lat:45.42N Long:110.27W Elev: 4653 ID:245086 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 16.0 20.1 24.9 30.7 38.2 45.5 50.0 48.3 39.7 32.6 23.9 17.7 32.3 Maximum 35.1 40.5 46.9 55.3 65.0 75.0 84.6 84.9 73.0 60.3 43.5 36.3 58.4 Mean 25.6 30.3 35.9 43.0 51.6 60.3 67.3 66.6 56.4 46.5 33.7 27.0 45.4 Precip. 0.64 0.48 0.85 1.58 2.83 2.46 1.54 1.37 1.48 1.20 0.74 0.56 15.73 HDD 1223 971 903 659 417 178 68 79 284 576 939 1178 7475 CDD 0 0 0 0 0 35 140 129 25 0 0 0 329 City:LOMA 1 WNW State:MT Lat:47.57N Long:110.32W Elev: 2580 ID:245153 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 5.7 11.5 21.4 30.9 40.6 48.8 52.8 51.2 40.8 30.4 18.2 9.1 30.1 Maximum 31.6 38.8 48.4 59.8 69.5 78.3 85.7 84.9 73.3 61.6 44.4 34.8 59.3 Mean 18.7 25.2 34.9 45.4 55.1 63.6 69.3 68.1 57.1 46.0 31.3 22.0 44.7 Precip. 0.60 0.38 0.76 1.12 2.14 2.31 1.36 1.51 1.17 0.74 0.52 0.48 13.09 HDD 1438 1116 933 591 317 114 44 88 276 590 1011 1334 7852 CDD 0 0 0 1 8 71 176 183 38 0 0 0 477 City:LUSTRE 4 NNW State:MT Lat:48.27N Long:105.56W Elev: 2923 ID:245285 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 2.5 9.6 19.1 30.2 41.1 49.4 53.8 53.0 43.0 32.8 17.9 6.4 29.9 Maximum 21.0 28.3 40.3 54.3 65.9 74.4 81.1 80.8 68.4 55.8 36.4 24.9 52.6 Mean 11.8 19.0 29.7 42.3 53.5 61.9 67.5 66.9 55.7 44.3 27.2 15.7 41.3 Precip. 0.26 0.23 0.50 0.72 1.94 2.20 2.08 1.31 1.22 0.55 0.33 0.32 11.66 HDD 1650 1290 1096 683 369 152 63 100 312 641 1136 1530 9022 CDD 0 0 0 0 12 59 139 159 33 0 0 0 402 City:MAC KENZIE State:MT Lat:46.09N Long:104.44W Elev: 2810 ID:245303 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.55 0.33 0.62 1.50 2.32 2.67 1.65 1.15 1.41 1.32 0.60 0.47 14.59 City:MALTA 7 E State:MT Lat:48.24N Long:107.44W Elev: 2245 ID:245338 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum -2.1 5.2 17.0 29.6 40.3 49.3 53.2 51.2 39.0 28.5 13.6 2.6 27.3 Maximum 22.1 31.3 44.1 59.0 69.4 78.4 84.6 84.2 72.2 59.9 39.3 27.1 56.0 Mean 10.0 18.3 30.6 44.3 54.9 63.9 68.9 67.7 55.6 44.2 26.5 14.9 41.7 Precip. 0.38 0.29 0.59 0.90 2.24 2.57 1.81 1.22 1.19 0.77 0.51 0.41 12.88 HDD 1706 1310 1068 621 328 110 48 84 315 645 1157 1554 8946 CDD 0 0 0 0 13 76 169 166 32 0 0 0 456 City:MALTA 35 S State:MT Lat:47.51N Long:107.57W Elev: 2650 ID:245340 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 2.3 8.8 19.1 29.0 39.3 49.3 53.3 51.6 39.3 29.0 15.7 6.3 28.6 Maximum 28.5 36.2 46.8 59.5 69.2 78.5 86.0 85.8 73.7 61.2 42.0 32.7 58.3 Mean 15.4 22.5 33.0 44.3 54.3 63.9 69.7 68.7 56.5 45.1 28.9 19.5 43.5 Precip. 0.32 0.28 0.63 0.98 2.38 2.25 1.86 1.27 1.10 0.56 0.38 0.39 12.40 HDD 1538 1189 993 622 342 117 45 79 288 617 1085 1412 8327 CDD 0 0 0 0 9 85 189 193 33 0 0 0 509 City:MANHATTAN State:MT Lat:45.52N Long:111.20W Elev: 4232 ID:245351 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.49 0.45 0.89 1.11 2.12 2.35 1.12 1.03 1.31 0.83 0.59 0.41 12.70 City:MARTINSDALE 3 NNW State:MT Lat:46.30N Long:110.20W Elev: 4800 ID:245387 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 13.0 15.9 21.0 27.4 35.0 42.1 46.1 44.6 36.8 29.9 20.9 14.9 29.0 Maximum 34.1 39.0 44.9 54.6 62.8 70.9 77.6 78.0 68.5 58.2 41.6 34.9 55.4 Mean 23.6 27.5 33.0 41.0 48.9 56.5 61.9 61.3 52.7 44.1 31.3 24.9 42.2 Precip. 0.49 0.32 0.71 1.20 2.20 2.25 1.86 1.56 1.21 0.77 0.53 0.49 13.59 HDD 1285 1051 993 720 499 264 143 159 378 650 1013 1244 8399 CDD 0 0 0 0 0 10 44 45 8 0 0 0 107 City:MEDICINE LAKE 3 SE State:MT Lat:48.29N Long:104.27W Elev: 1952 ID:245572 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum -1.8 7.2 18.1 30.3 42.3 50.7 54.3 52.6 41.7 30.7 15.7 3.1 28.7 Maximum 17.7 27.0 39.8 55.6 68.1 76.8 82.6 81.9 69.8 57.6 36.0 22.8 53.0 Mean 8.0 17.1 29.0 43.0 55.2 63.8 68.5 67.3 55.8 44.2 25.9 13.0 40.9 Precip. 0.33 0.24 0.54 0.92 1.98 2.59 2.25 1.39 1.30 0.71 0.38 0.36 12.99 HDD 1771 1342 1119 662 320 133 54 95 303 646 1175 1614 9234 CDD 0 0 0 0 16 95 161 165 25 0 0 0 462 City:MELSTONE State:MT Lat:46.36N Long:107.52W Elev: 2920 ID:245596 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 11.7 16.5 23.9 32.3 41.6 50.3 55.1 54.3 44.2 34.5 23.2 14.1 33.5 Maximum 33.6 40.5 49.5 60.2 70.2 80.1 87.7 87.2 75.2 62.5 45.1 35.6 60.6 Mean 22.7 28.5 36.7 46.3 55.9 65.2 71.4 70.8 59.7 48.5 34.2 24.9 47.1 Precip. 0.60 0.42 0.87 1.49 2.72 2.42 1.58 1.22 1.47 1.04 0.61 0.60 15.04 HDD 1312 1022 878 563 295 95 29 47 212 512 926 1245 7136 CDD 0 0 0 0 13 101 228 225 54 0 0 0 621 City:MELVILLE 4 W State:MT Lat:46.06N Long:110.03W Elev: 5365 ID:245603 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 10.3 13.5 18.8 26.0 34.3 41.7 46.6 45.7 37.4 28.8 17.8 11.4 27.7 Maximum 34.0 37.6 42.7 51.1 60.0 68.4 75.6 75.5 65.8 55.6 41.1 35.4 53.6 Mean 22.2 25.6 30.8 38.6 47.2 55.1 61.1 60.6 51.6 42.2 29.5 23.4 40.7 Precip. 0.62 0.50 1.18 1.91 2.84 2.95 2.14 1.64 1.39 1.14 0.75 0.56 17.62 HDD 1328 1105 1061 794 553 306 171 191 411 708 1066 1291 8985 CDD 0 0 0 0 0 7 50 55 9 0 0 0 121 City:MENARD 3 NE State:MT Lat:46.00N Long:111.08W Elev: 5053 ID:245608 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.59 0.50 0.95 1.26 2.47 2.32 1.32 1.18 1.43 1.01 0.75 0.64 14.42 City:MILDRED 5 N State:MT Lat:46.45N Long:104.58W Elev: 2510 ID:245668 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 1.5 9.3 17.6 28.5 39.5 49.0 54.6 52.6 40.6 30.6 17.0 5.8 28.9 Maximum 26.0 34.4 45.2 57.7 69.0 78.9 86.7 85.9 74.0 61.2 42.0 30.5 57.6 Mean 13.8 21.9 31.4 43.1 54.3 64.0 70.7 69.3 57.3 45.9 29.5 18.2 43.3 Precip. 0.36 0.22 0.61 1.22 2.03 1.97 1.73 1.25 1.08 1.00 0.40 0.22 12.09 HDD 1589 1209 1042 657 350 132 39 67 269 593 1065 1451 8463 CDD 0 0 0 0 17 101 213 200 38 0 0 0 569 City:MILES CITY AP State:MT Lat:46.26N Long:105.53W Elev: 2628 ID:245690 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 7.4 14.3 23.7 34.5 44.9 54.2 60.2 58.9 46.8 35.3 21.6 10.5 34.4 Maximum 27.3 35.2 46.1 58.8 69.5 79.9 87.9 86.8 74.0 60.0 41.8 30.6 58.2 Mean 17.4 24.8 34.9 46.7 57.2 67.1 74.1 72.9 60.4 47.7 31.7 20.6 46.3 Precip. 0.50 0.34 0.58 1.40 2.19 2.42 1.61 1.16 1.19 1.13 0.52 0.45 13.49 HDD 1477 1126 933 553 267 81 20 41 208 537 1000 1377 7620 CDD 0 0 0 1 25 143 300 284 69 0 0 0 822 City:MILLEGAN 14 SE State:MT Lat:46.53N Long:111.10W Elev: 4970 ID:245712 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 8.6 12.1 18.6 25.7 33.6 40.0 43.8 42.9 34.1 26.3 16.6 9.3 26.0 Maximum 31.5 37.0 43.6 53.0 61.7 70.9 78.4 78.2 67.9 56.0 40.0 33.0 54.3 Mean 20.1 24.6 31.1 39.4 47.7 55.5 61.1 60.6 51.0 41.2 28.3 21.2 40.2 Precip. 0.95 0.51 1.36 1.66 2.73 2.59 2.19 1.60 1.81 1.15 0.84 1.01 18.40 HDD 1395 1133 1050 771 538 293 160 180 425 739 1102 1359 9145 CDD 0 0 0 0 0 7 39 42 5 0 0 0 93 City:MISSOULA 2 NE State:MT Lat:46.54N Long:113.58W Elev: 3420 ID:245735 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 16.8 20.9 27.0 32.7 39.6 45.9 50.5 49.9 41.7 32.6 24.5 17.0 33.3 Maximum 32.5 39.3 48.1 57.1 65.3 73.4 82.3 82.2 71.2 57.4 40.5 32.1 56.8 Mean 24.7 30.1 37.6 44.9 52.5 59.7 66.4 66.1 56.5 45.0 32.5 24.6 45.1 Precip. 1.35 1.05 1.21 1.43 2.38 2.10 1.28 1.23 1.30 1.08 1.20 1.43 17.04 HDD 1250 977 851 604 392 191 84 81 282 620 976 1254 7562 CDD 0 0 0 0 3 30 127 113 25 0 0 0 298 City:MISSOULA INTL AP State:MT Lat:46.55N Long:114.06W Elev: 3192 ID:245745 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 16.2 20.5 27.1 32.4 39.3 45.9 50.2 49.3 40.6 31.4 24.0 16.5 32.8 Maximum 30.8 37.4 48.1 58.0 66.1 74.5 83.6 83.2 71.5 57.4 40.0 30.3 56.7 Mean 23.5 29.0 37.6 45.2 52.7 60.2 66.9 66.3 56.1 44.4 32.0 23.4 44.8 Precip. 1.06 0.77 0.96 1.09 1.95 1.73 1.09 1.15 1.08 0.83 0.96 1.15 13.82 HDD 1291 1019 852 596 384 178 55 62 276 637 985 1287 7622 CDD 0 0 0 0 3 33 111 99 10 0 0 0 256 City:MIZPAH 4 NNW State:MT Lat:46.17N Long:105.18W Elev: 2480 ID:245754 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 3.7 11.9 21.8 31.6 41.6 50.7 55.6 53.6 42.1 30.6 17.9 6.8 30.7 Maximum 28.8 36.6 48.0 60.8 71.7 81.6 90.1 89.5 77.0 62.6 43.1 32.1 60.2 Mean 16.3 24.3 34.9 46.2 56.7 66.2 72.9 71.6 59.6 46.6 30.5 19.5 45.4 Precip. 0.45 0.29 0.58 1.40 2.26 2.24 1.67 1.17 1.29 1.11 0.55 0.37 13.38 HDD 1512 1141 933 564 282 95 22 44 214 570 1036 1413 7826 CDD 0 0 0 0 23 130 265 246 50 0 0 0 714 City:MOCCASIN EXPERIMENT STN State:MT Lat:47.03N Long:109.57W Elev: 4300 ID:245761 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 12.4 16.3 22.5 30.6 39.2 46.8 51.4 51.1 42.1 33.0 22.4 15.1 31.9 Maximum 34.4 38.4 44.5 53.6 63.0 71.5 79.7 80.3 69.0 58.1 43.4 36.3 56.0 Mean 23.4 27.4 33.5 42.1 51.1 59.2 65.6 65.7 55.6 45.6 32.9 25.7 44.0 Precip. 0.60 0.44 0.90 1.32 2.74 2.81 2.07 1.97 1.46 0.94 0.59 0.58 16.42 HDD 1290 1055 977 687 434 209 92 114 314 604 964 1218 7958 CDD 0 0 0 0 2 33 110 137 30 0 0 0 312 City:MONIDA State:MT Lat:44.34N Long:112.19W Elev: 6785 ID:245811 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.83 0.87 1.08 1.11 1.86 1.76 1.33 1.08 1.11 1.00 0.79 1.00 13.82 City:MOORHEAD 9 NE State:MT Lat:45.11N Long:105.45W Elev: 3220 ID:245870 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 7.5 14.1 22.6 31.6 41.1 50.4 54.9 52.9 42.5 32.0 20.1 10.1 31.7 Maximum 32.3 39.6 49.2 59.6 69.7 79.9 88.1 87.1 75.4 62.1 44.1 34.0 60.1 Mean 19.9 26.9 35.9 45.6 55.4 65.2 71.5 70.0 59.0 47.1 32.1 22.1 45.9 Precip. 0.37 0.30 0.62 1.30 2.22 2.37 1.48 1.06 1.09 1.08 0.48 0.37 12.74 HDD 1398 1068 901 582 310 108 26 44 225 555 987 1332 7536 CDD 0 0 0 0 13 112 227 198 44 0 0 0 594 City:MOSBY 4 ENE State:MT Lat:47.01N Long:107.49W Elev: 2790 ID:245872 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 5.3 12.4 22.7 31.9 41.6 50.4 55.6 54.5 43.7 33.8 19.8 9.6 31.8 Maximum 30.4 38.1 47.6 58.6 68.3 78.7 86.2 86.3 74.0 62.2 44.1 34.4 59.1 Mean 17.9 25.3 35.2 45.3 55.0 64.6 70.9 70.4 58.9 48.0 32.0 22.0 45.5 Precip. 0.50 0.34 0.67 1.09 2.60 2.11 1.68 1.12 1.28 0.84 0.43 0.42 13.08 HDD 1461 1113 926 593 328 110 33 53 235 527 992 1334 7705 CDD 0 0 0 0 16 97 215 219 50 0 0 0 597 City:MYSTIC LAKE State:MT Lat:45.15N Long:109.44W Elev: 6558 ID:245961 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 17.8 19.7 23.2 29.1 37.1 45.1 50.9 51.0 42.5 34.8 25.1 19.2 33.0 Maximum 33.2 36.3 41.5 48.9 57.7 66.9 73.8 73.4 63.9 53.4 39.2 33.2 51.8 Mean 25.5 28.0 32.4 39.0 47.4 56.0 62.4 62.2 53.2 44.1 32.2 26.2 42.4 Precip. 1.29 1.18 2.07 2.81 3.78 3.06 2.42 1.91 2.09 2.14 1.51 1.47 25.73 HDD 1225 1036 1013 779 546 285 142 159 371 647 986 1203 8392 CDD 0 0 0 0 0 14 60 73 17 0 0 0 164 City:NEIHART 8 NNW State:MT Lat:47.02N Long:110.47W Elev: 5230 ID:246008 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 13.8 17.2 21.7 28.3 35.8 42.6 46.7 46.4 39.0 32.0 22.5 15.6 30.1 Maximum 34.3 38.6 44.3 52.8 61.6 70.6 78.4 79.0 68.7 57.3 41.3 35.0 55.2 Mean 24.1 27.9 33.0 40.6 48.7 56.6 62.6 62.7 53.9 44.7 31.9 25.3 42.7 Precip. 0.95 0.66 1.36 1.84 3.49 3.32 2.28 2.14 1.98 1.38 1.01 1.01 21.42 HDD 1271 1038 992 734 506 267 133 157 354 630 994 1231 8307 CDD 0 0 0 0 0 14 58 86 19 0 0 0 177 City:NORRIS MADISON PUMP HS State:MT Lat:45.29N Long:111.38W Elev: 4745 ID:246157 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 19.4 22.8 27.9 34.2 42.0 49.0 54.6 54.1 45.4 37.1 27.5 20.6 36.2 Maximum 35.2 39.9 46.3 55.1 64.3 73.7 82.4 82.3 71.7 59.1 43.0 35.6 57.4 Mean 27.3 31.4 37.1 44.7 53.2 61.4 68.5 68.2 58.6 48.1 35.3 28.1 46.8 Precip. 0.57 0.47 1.20 1.76 3.18 2.80 1.59 1.58 1.66 1.45 0.73 0.57 17.56 HDD 1169 943 865 610 370 159 54 58 236 523 893 1145 7025 CDD 0 0 0 0 3 49 163 156 42 0 0 0 413 City:NYE 2 State:MT Lat:45.26N Long:109.48W Elev: 4840 ID:246190 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 17.6 20.0 24.8 31.1 37.4 43.5 47.6 46.4 39.7 33.0 25.3 18.3 32.1 Maximum 38.7 42.4 49.2 57.6 65.6 73.9 81.9 82.3 72.4 61.3 45.9 39.7 59.2 Mean 28.2 31.2 37.0 44.4 51.5 58.7 64.8 64.4 56.1 47.2 35.6 29.0 45.7 Precip. 0.63 0.58 1.13 2.04 3.08 2.98 1.81 1.45 1.81 1.44 0.74 0.75 18.44 HDD 1143 947 869 619 419 212 93 111 286 553 883 1118 7253 CDD 0 0 0 0 1 23 86 91 17 0 0 0 218 City:OLNEY State:MT Lat:48.33N Long:114.34W Elev: 3165 ID:246218 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 9.2 12.3 19.8 26.6 34.4 40.5 43.3 41.8 33.6 25.4 18.9 12.3 26.5 Maximum 26.4 34.1 43.6 54.5 64.3 71.7 79.3 79.0 68.1 53.4 34.6 26.8 53.0 Mean 17.8 23.2 31.7 40.6 49.4 56.1 61.3 60.4 50.9 39.4 26.8 19.6 39.8 Precip. 2.39 2.01 1.34 1.37 2.31 2.68 1.79 1.49 1.23 1.42 2.39 2.25 22.67 HDD 1463 1170 1032 735 485 272 155 171 427 794 1147 1410 9261 CDD 0 0 0 0 0 5 41 28 2 0 0 0 76 City:OPHEIM 10 N State:MT Lat:49.00N Long:106.23W Elev: 2980 ID:246236 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum -2.7 4.9 15.7 26.5 36.7 45.4 49.2 47.7 37.1 27.3 12.8 0.9 25.1 Maximum 19.4 26.5 38.8 55.3 67.2 75.6 81.3 81.8 69.5 56.4 35.8 23.9 52.6 Mean 8.4 15.7 27.3 40.9 52.0 60.5 65.3 64.8 53.3 41.9 24.3 12.4 38.9 Precip. 0.26 0.23 0.38 0.63 2.05 2.80 2.37 1.24 1.26 0.67 0.28 0.31 12.48 HDD 1757 1380 1171 723 410 183 89 126 369 718 1221 1631 9778 CDD 0 0 0 0 5 48 96 119 18 0 0 0 286 City:OPHEIM 12 SSE State:MT Lat:48.42N Long:106.19W Elev: 2950 ID:246238 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum -4.8 3.4 15.9 27.5 38.1 46.8 51.0 49.6 38.4 28.1 12.5 -0.5 25.5 Maximum 17.7 25.2 37.7 53.1 65.5 74.1 80.2 80.1 67.4 54.4 35.0 22.1 51.0 Mean 6.5 14.3 26.8 40.3 51.8 60.5 65.6 64.9 52.9 41.3 23.8 10.8 38.3 Precip. 0.24 0.20 0.39 0.79 1.93 2.58 2.16 1.25 1.18 0.65 0.30 0.27 11.94 HDD 1817 1419 1184 741 414 178 90 131 380 735 1239 1682 10010 CDD 0 0 0 0 6 42 107 127 16 0 0 0 298 City:OTTER 9 SSW State:MT Lat:45.06N Long:106.15W Elev: 4060 ID:246287 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 12.5 17.8 24.8 33.1 41.8 50.3 56.0 54.9 45.1 34.7 22.8 14.7 34.0 Maximum 32.0 39.1 48.9 59.6 69.5 78.7 87.1 86.9 75.2 60.6 42.4 34.1 59.5 Mean 22.3 28.5 36.9 46.4 55.7 64.5 71.6 70.9 60.2 47.7 32.6 24.4 46.8 Precip. 0.85 0.67 1.32 1.93 2.64 3.24 1.70 1.06 1.38 1.48 1.01 0.87 18.15 HDD 1325 1024 874 560 302 114 31 41 205 538 972 1258 7244 CDD 0 0 0 0 12 98 233 224 59 0 0 0 626 City:OVANDO 9 SSE State:MT Lat:46.54N Long:113.04W Elev: 4255 ID:246304 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 4.4 9.2 18.4 24.1 30.7 36.9 39.6 38.1 29.9 21.8 14.8 6.0 22.8 Maximum 29.0 34.7 43.9 54.6 63.9 71.9 79.8 80.4 69.5 57.0 39.2 29.3 54.4 Mean 16.7 22.0 31.2 39.4 47.3 54.4 59.7 59.3 49.7 39.4 27.0 17.7 38.7 Precip. 0.95 0.65 0.55 0.85 1.76 1.67 1.15 1.24 0.99 0.82 0.96 0.99 12.58 HDD 1498 1205 1050 771 549 322 189 201 460 794 1141 1467 9647 CDD 0 0 0 0 0 3 25 22 2 0 0 0 52 City:PENDROY 2 NNW State:MT Lat:48.07N Long:112.20W Elev: 4365 ID:246426 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.58 0.37 0.94 1.38 2.79 2.17 1.44 1.93 1.38 0.80 0.50 0.51 14.79 City:PHILIPSBURG R S State:MT Lat:46.18N Long:113.18W Elev: 5270 ID:246472 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 14.1 17.0 22.2 27.3 33.7 40.0 42.8 41.8 34.7 28.2 20.6 14.0 28.0 Maximum 32.9 37.4 44.1 52.6 60.8 69.3 77.7 77.9 67.9 57.3 40.9 33.1 54.3 Mean 23.5 27.2 33.2 40.0 47.3 54.7 60.3 59.9 51.3 42.8 30.8 23.6 41.2 Precip. 0.58 0.51 0.88 1.47 2.56 2.18 1.35 1.62 1.48 1.08 0.72 0.59 15.02 HDD 1287 1058 988 751 551 315 177 188 416 690 1029 1284 8734 CDD 0 0 0 0 0 5 30 28 4 0 0 0 67 City:PLENTYWOOD State:MT Lat:48.47N Long:104.33W Elev: 2043 ID:246586 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum -2.3 6.6 17.7 29.1 40.7 50.2 53.4 51.9 40.2 29.4 15.3 2.7 27.9 Maximum 20.9 29.8 42.0 58.1 70.4 79.0 84.2 83.5 71.5 58.1 37.0 24.4 54.9 Mean 9.3 18.2 29.9 43.6 55.6 64.6 68.8 67.7 55.9 43.8 26.2 13.6 41.4 Precip. 0.34 0.31 0.61 0.82 1.87 2.74 2.24 1.36 1.36 0.72 0.41 0.37 13.15 HDD 1729 1310 1090 643 310 116 46 76 300 658 1165 1594 9037 CDD 0 0 0 0 18 104 164 158 26 0 0 0 470 City:PLEVNA State:MT Lat:46.25N Long:104.31W Elev: 2780 ID:246601 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 3.3 10.6 19.6 30.0 40.6 49.5 54.6 52.6 41.9 30.9 17.9 6.8 29.9 Maximum 28.2 34.9 45.4 58.4 69.3 79.3 87.2 86.3 74.7 60.8 41.9 31.5 58.2 Mean 15.8 22.8 32.5 44.2 55.0 64.4 70.9 69.5 58.3 45.9 29.9 19.2 44.0 Precip. 0.55 0.44 0.77 1.38 2.28 2.43 1.77 1.44 1.37 1.25 0.59 0.42 14.69 HDD 1527 1183 1008 625 331 127 34 62 248 593 1053 1420 8211 CDD 0 0 0 0 20 109 218 199 46 0 0 0 592 City:POLEBRIDGE State:MT Lat:48.46N Long:114.17W Elev: 3520 ID:246615 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 5.8 9.9 17.2 24.7 32.0 38.3 40.7 39.1 30.9 23.4 17.3 8.4 24.0 Maximum 28.5 35.7 43.4 53.9 62.8 70.3 78.2 78.8 68.0 55.0 37.5 29.1 53.4 Mean 17.2 22.8 30.3 39.3 47.4 54.3 59.5 59.0 49.5 39.2 27.4 18.8 38.7 Precip. 2.23 1.79 1.46 1.21 1.70 2.24 1.57 1.32 1.16 1.34 2.36 2.38 20.76 HDD 1485 1182 1077 771 545 323 191 206 468 799 1128 1434 9609 CDD 0 0 0 0 0 2 20 18 2 0 0 0 42 City:POLSON State:MT Lat:47.40N Long:114.12W Elev: 2990 ID:246635 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 20.5 23.5 28.7 34.9 41.9 48.6 53.5 53.5 45.2 36.5 28.1 21.6 36.4 Maximum 32.6 38.2 46.7 57.2 65.8 73.5 81.5 81.2 70.0 56.6 41.1 33.1 56.5 Mean 26.6 30.9 37.7 46.1 53.9 61.1 67.5 67.4 57.6 46.6 34.6 27.4 46.5 Precip. 1.11 0.88 1.04 1.33 2.32 2.14 1.31 1.32 1.30 1.07 1.15 1.18 16.15 HDD 1192 956 846 568 347 158 62 59 250 573 913 1168 7092 CDD 0 0 0 0 3 40 139 132 28 0 0 0 342 City:POLSON KERR DAM State:MT Lat:47.41N Long:114.14W Elev: 2730 ID:246640 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 20.0 22.5 27.7 34.1 41.2 47.7 52.4 52.4 44.1 35.7 27.9 21.3 35.6 Maximum 32.9 39.0 48.2 58.6 66.4 73.6 82.2 82.7 71.2 57.9 41.3 33.3 57.3 Mean 26.5 30.8 38.0 46.4 53.8 60.7 67.3 67.6 57.7 46.8 34.6 27.3 46.5 Precip. 0.97 0.79 0.82 1.15 2.21 2.15 1.37 1.13 1.22 1.00 1.07 1.08 14.96 HDD 1194 959 839 560 351 172 62 57 245 565 912 1168 7084 CDD 0 0 0 0 4 41 133 137 25 0 0 0 340 City:PONY State:MT Lat:45.39N Long:111.54W Elev: 5590 ID:246655 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 12.3 15.9 21.8 28.8 36.9 43.6 49.4 48.2 39.5 31.2 20.3 13.5 30.1 Maximum 32.3 36.6 42.6 51.3 59.6 68.4 76.5 76.4 66.4 55.3 39.8 33.2 53.2 Mean 22.3 26.3 32.2 40.1 48.3 56.0 63.0 62.3 53.0 43.3 30.1 23.4 41.7 Precip. 0.63 0.68 1.43 1.96 3.02 2.38 1.63 1.51 1.71 1.42 0.91 0.59 17.87 HDD 1323 1085 1016 748 519 281 136 148 375 674 1049 1292 8646 CDD 0 0 0 0 0 11 72 64 14 0 0 0 161 City:POPLAR 2 E State:MT Lat:48.08N Long:105.09W Elev: 2000 ID:246660 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 1.1 9.0 19.6 31.4 43.2 51.7 56.1 54.6 43.4 32.4 18.0 5.5 30.5 Maximum 21.5 31.0 44.5 59.8 71.8 81.0 86.6 86.1 74.3 60.6 39.1 26.2 56.9 Mean 11.3 20.0 32.1 45.6 57.5 66.4 71.4 70.4 58.9 46.5 28.6 15.9 43.7 Precip. 0.29 0.18 0.48 0.88 2.18 2.65 2.06 1.04 1.21 0.70 0.33 0.40 12.40 HDD 1665 1261 1022 585 264 89 32 56 231 572 1094 1524 8395 CDD 0 0 0 3 32 129 230 222 46 0 0 0 662 City:PORT OF MORGAN State:MT Lat:49.00N Long:107.50W Elev: 2830 ID:246672 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 1.8 8.7 19.2 30.7 40.3 48.1 53.1 51.4 41.0 31.2 16.7 5.3 29.0 Maximum 21.4 29.5 41.4 57.7 68.8 76.3 83.3 82.7 71.5 58.6 37.9 25.8 54.6 Mean 11.6 19.1 30.3 44.2 54.6 62.2 68.2 67.1 56.3 44.9 27.3 15.6 41.8 Precip. 0.17 0.17 0.27 0.49 1.71 2.61 1.99 0.93 1.07 0.52 0.39 0.19 10.51 HDD 1655 1286 1077 625 338 150 55 96 296 624 1130 1533 8865 CDD 0 0 0 1 14 67 154 158 33 0 0 0 427 City:POTOMAC State:MT Lat:46.53N Long:113.34W Elev: 3620 ID:246685 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 7.5 11.2 19.3 24.8 32.4 39.2 41.7 39.3 31.8 23.4 16.6 8.2 24.6 Maximum 29.2 36.4 45.6 56.3 65.3 73.1 81.5 81.9 71.2 57.5 38.4 28.8 55.4 Mean 18.4 23.8 32.5 40.6 48.9 56.2 61.6 60.6 51.5 40.5 27.5 18.5 40.1 Precip. 1.48 1.09 0.79 1.01 1.78 1.82 0.97 1.05 1.02 1.02 1.45 1.66 15.14 HDD 1447 1154 1009 733 501 272 149 165 408 761 1124 1442 9165 CDD 0 0 0 0 0 7 43 29 3 0 0 0 82 City:POWDERVILLE 8 NNE State:MT Lat:45.51N Long:105.02W Elev: 2800 ID:246691 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 5.3 13.1 21.2 31.5 41.7 51.1 56.4 54.5 42.9 31.4 19.0 8.3 31.4 Maximum 30.0 37.8 47.7 60.2 71.0 81.6 90.0 89.2 77.1 62.3 43.6 33.1 60.3 Mean 17.7 25.5 34.5 45.9 56.4 66.4 73.2 71.9 60.0 46.9 31.3 20.7 45.9 Precip. 0.47 0.38 0.55 1.59 2.20 2.71 1.63 1.08 1.39 1.38 0.57 0.40 14.35 HDD 1468 1107 947 574 292 95 25 39 209 563 1012 1374 7705 CDD 0 0 0 0 24 134 280 251 59 0 0 0 748 City:POWER 6 SE State:MT Lat:47.39N Long:111.36W Elev: 3750 ID:246700 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.44 0.38 0.70 1.06 2.07 1.64 1.29 1.47 1.12 0.73 0.44 0.44 11.78 City:PRYOR 1 S State:MT Lat:45.25N Long:108.32W Elev: 4129 ID:246747 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.66 0.58 1.24 1.87 3.19 2.08 1.42 0.99 1.60 1.72 0.90 0.56 16.81 City:RAPELJE 4 S State:MT Lat:45.55N Long:109.15W Elev: 4125 ID:246862 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 12.6 16.3 22.5 30.1 38.4 46.2 51.5 50.7 41.5 32.4 21.7 14.8 31.6 Maximum 36.2 41.4 48.5 57.9 67.1 77.3 85.4 85.0 73.8 61.5 44.8 37.7 59.7 Mean 24.4 28.9 35.5 44.0 52.8 61.8 68.5 67.9 57.7 47.0 33.3 26.3 45.7 Precip. 0.63 0.54 1.02 1.66 2.69 1.94 1.71 1.28 1.35 1.25 0.69 0.55 15.31 HDD 1260 1012 915 631 383 154 61 75 257 561 952 1202 7463 CDD 0 0 0 0 3 57 167 163 37 0 0 0 427 City:RAYMOND BORDER STATION State:MT Lat:49.00N Long:104.35W Elev: 2350 ID:246893 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum -0.8 7.3 17.6 29.6 40.7 49.7 53.7 52.3 42.1 31.4 16.3 3.5 28.6 Maximum 19.5 27.9 39.8 56.7 69.0 77.4 83.1 83.1 71.5 58.5 36.3 24.0 53.9 Mean 9.4 17.6 28.7 43.2 54.9 63.6 68.4 67.7 56.8 45.0 26.3 13.8 41.3 Precip. 0.21 0.16 0.41 0.86 2.03 2.96 2.35 1.53 1.37 0.65 0.27 0.28 13.08 HDD 1726 1327 1125 658 331 136 61 88 280 622 1162 1588 9104 CDD 0 0 0 2 16 92 165 172 33 0 0 0 480 City:RAYNESFORD 2 NNW State:MT Lat:47.18N Long:110.45W Elev: 4215 ID:246902 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 14.1 18.1 23.6 30.7 38.7 46.1 50.5 50.6 42.7 34.8 24.2 17.0 32.6 Maximum 33.8 38.7 44.8 54.9 63.9 72.1 79.7 80.3 69.8 58.4 42.6 35.7 56.2 Mean 24.0 28.4 34.2 42.8 51.3 59.1 65.1 65.5 56.3 46.6 33.4 26.4 44.4 Precip. 0.80 0.63 1.26 1.58 2.98 2.93 1.91 1.67 1.70 1.20 0.86 0.87 18.39 HDD 1273 1026 955 665 426 204 93 114 301 570 949 1198 7774 CDD 0 0 0 0 1 26 95 129 39 0 0 0 290 City:RED LODGE 2 N State:MT Lat:45.13N Long:109.14W Elev: 5500 ID:246918 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 11.8 15.5 21.0 28.6 37.0 44.1 49.3 48.5 40.0 31.7 20.2 13.4 30.1 Maximum 34.1 37.4 43.9 52.7 61.9 71.7 79.2 79.1 68.6 56.7 41.7 35.5 55.2 Mean 23.0 26.5 32.5 40.7 49.5 57.9 64.3 63.8 54.3 44.2 31.0 24.5 42.7 Precip. 1.31 1.06 2.27 2.88 3.96 2.56 1.69 1.37 2.12 2.04 1.38 1.13 23.77 HDD 1304 1079 1009 730 483 240 118 131 340 645 1021 1257 8357 CDD 0 0 0 0 1 27 95 92 18 0 0 0 233 City:REDSTONE State:MT Lat:48.49N Long:104.57W Elev: 2110 ID:246927 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum -2.3 6.2 16.8 27.5 38.8 47.7 51.1 49.4 38.5 28.6 14.0 2.1 26.5 Maximum 21.5 29.4 41.3 57.7 70.4 79.2 85.0 84.6 72.0 58.5 37.6 25.8 55.3 Mean 9.6 17.8 29.1 42.6 54.6 63.5 68.1 67.0 55.3 43.6 25.8 14.0 40.9 Precip. 0.31 0.22 0.58 0.81 2.00 2.54 2.13 1.61 1.31 0.75 0.36 0.33 12.95 HDD 1719 1321 1115 673 338 134 53 95 314 666 1176 1583 9187 CDD 0 0 0 0 16 88 148 156 21 0 0 0 429 City:RIDGEWAY 1 S State:MT Lat:45.30N Long:104.27W Elev: 3320 ID:247034 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 3.8 10.9 19.7 30.8 40.8 50.1 55.4 53.4 41.8 30.6 17.4 7.0 30.1 Maximum 28.8 35.1 43.9 56.8 67.3 76.4 83.7 83.3 71.8 59.1 41.8 32.2 56.7 Mean 16.3 23.0 31.8 43.8 54.1 63.3 69.6 68.4 56.8 44.9 29.6 19.6 43.4 Precip. 0.46 0.35 0.70 1.48 2.43 2.51 1.75 1.11 1.20 1.24 0.56 0.44 14.23 HDD 1510 1176 1029 637 352 138 50 71 283 624 1062 1407 8339 CDD 0 0 0 0 13 85 191 175 36 0 0 0 500 City:ROBERTS 1 N State:MT Lat:45.23N Long:109.10W Elev: 4670 ID:247128 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.53 0.47 0.96 1.57 3.08 1.83 1.09 1.00 1.56 1.44 0.66 0.51 14.70 City:ROCK SPRINGS State:MT Lat:46.49N Long:106.15W Elev: 3024 ID:247136 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 6.2 12.7 21.5 31.6 41.9 50.7 56.1 55.5 44.3 33.6 20.1 9.0 31.9 Maximum 27.4 34.1 44.8 57.1 67.6 77.0 85.0 84.7 72.4 59.2 41.1 30.4 56.7 Mean 16.8 23.4 33.2 44.4 54.8 63.9 70.6 70.1 58.4 46.4 30.6 19.7 44.4 Precip. 0.29 0.18 0.34 1.04 2.15 2.32 1.53 0.87 1.17 0.87 0.36 0.25 11.37 HDD 1495 1165 987 620 335 134 41 60 246 577 1032 1405 8097 CDD 0 0 0 0 17 99 213 218 45 0 0 0 592 City:ROCKY BOY State:MT Lat:48.15N Long:109.47W Elev: 3691 ID:247148 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.65 0.50 0.74 1.31 2.92 2.47 1.85 1.63 1.44 0.92 0.65 0.63 15.71 City:ROGERS PASS 9 NNE State:MT Lat:47.11N Long:112.17W Elev: 4200 ID:247159 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 10.4 15.5 21.7 29.4 37.6 44.7 49.1 48.1 39.0 31.8 20.5 13.4 30.1 Maximum 32.0 38.0 44.3 53.5 62.5 70.9 79.6 79.3 68.8 57.2 40.3 33.6 55.0 Mean 21.2 26.8 33.0 41.5 50.1 57.8 64.4 63.7 53.9 44.5 30.4 23.5 42.6 Precip. 0.79 0.63 1.13 1.57 3.30 2.58 1.71 1.82 1.61 1.20 0.66 0.77 17.77 HDD 1357 1071 993 706 464 234 110 150 363 636 1038 1287 8409 CDD 0 0 0 0 0 19 89 109 30 0 0 0 247 City:ROUNDUP State:MT Lat:46.27N Long:108.33W Elev: 3227 ID:247214 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 12.5 17.3 24.0 32.3 41.6 49.9 54.7 53.1 42.9 33.6 22.4 14.7 33.3 Maximum 36.3 42.7 50.7 60.3 69.7 79.0 86.5 86.1 74.8 62.8 45.6 37.7 61.0 Mean 24.4 30.0 37.4 46.3 55.7 64.5 70.6 69.6 58.9 48.2 34.0 26.2 47.2 Precip. 0.43 0.36 0.64 1.28 2.35 2.15 1.65 1.29 1.27 1.03 0.34 0.46 13.25 HDD 1259 980 857 562 303 106 31 57 236 521 929 1203 7044 CDD 0 0 0 0 11 90 205 199 51 0 0 0 556 City:ROY 8 NE State:MT Lat:47.26N Long:108.51W Elev: 3445 ID:247228 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 7.7 13.1 21.9 31.0 40.3 48.4 53.0 52.0 42.0 32.1 19.6 10.4 31.0 Maximum 31.7 37.8 46.5 57.6 67.5 76.9 84.6 84.6 72.9 61.1 43.7 34.3 58.3 Mean 19.7 25.5 34.2 44.3 53.9 62.7 68.8 68.3 57.5 46.6 31.7 22.4 44.6 Precip. 0.50 0.31 0.81 1.14 2.73 2.30 1.97 1.53 1.22 0.73 0.44 0.50 14.18 HDD 1405 1108 955 621 350 133 53 83 267 571 1001 1323 7870 CDD 0 0 0 0 6 63 169 186 39 0 0 0 463 City:ROY 24 NE MOBRIDGE State:MT Lat:47.37N Long:108.42W Elev: 2313 ID:247234 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 3.8 10.2 21.1 30.5 40.6 48.8 53.3 51.6 40.3 29.7 16.3 6.4 29.4 Maximum 30.8 39.5 49.5 60.9 70.6 80.3 87.4 87.3 75.4 63.2 44.1 33.5 60.2 Mean 17.3 24.9 35.3 45.7 55.6 64.6 70.4 69.5 57.9 46.5 30.2 20.0 44.8 Precip. 0.48 0.36 0.65 1.00 2.46 2.50 1.95 1.69 1.24 0.68 0.49 0.48 13.98 HDD 1479 1124 922 578 303 100 30 65 250 575 1044 1396 7866 CDD 0 0 0 0 11 87 196 202 35 0 0 0 531 City:RUDYARD 27 N State:MT Lat:48.56N Long:110.34W Elev: 3010 ID:247250 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 4.9 11.1 20.6 30.7 40.7 48.1 52.3 51.6 41.4 31.5 17.9 7.7 29.9 Maximum 26.8 33.1 43.3 56.1 67.0 75.0 81.8 81.8 70.3 58.3 39.5 30.6 55.3 Mean 15.9 22.1 32.0 43.4 53.9 61.6 67.1 66.7 55.9 44.9 28.7 19.2 42.6 Precip. 0.25 0.24 0.39 0.81 1.72 2.17 1.39 1.13 1.00 0.42 0.33 0.28 10.13 HDD 1523 1201 1024 649 351 151 59 99 310 624 1090 1421 8502 CDD 0 0 0 0 5 48 122 152 34 0 0 0 361 City:RYEGATE 18 NNW State:MT Lat:46.32N Long:109.21W Elev: 4440 ID:247263 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 9.0 13.5 19.9 28.5 37.9 46.0 51.1 50.5 40.0 30.1 19.0 12.2 29.8 Maximum 32.1 38.3 44.9 54.7 64.0 73.7 80.9 81.4 70.2 58.6 42.7 34.5 56.3 Mean 20.6 25.9 32.4 41.6 51.0 59.9 66.0 66.0 55.1 44.4 30.9 23.4 43.1 Precip. 0.52 0.29 0.62 1.10 1.91 2.34 1.82 1.47 1.06 0.77 0.50 0.47 12.87 HDD 1379 1095 1011 702 437 198 87 106 322 640 1026 1292 8295 CDD 0 0 0 0 2 44 118 135 25 0 0 0 324 City:SACO 1 NNW State:MT Lat:48.28N Long:107.21W Elev: 2170 ID:247265 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum -2.7 5.2 16.4 28.2 39.9 49.3 53.3 51.0 38.9 27.7 13.8 2.2 26.9 Maximum 22.8 31.4 43.4 59.0 69.5 77.1 83.4 82.7 71.0 58.8 39.5 27.5 55.5 Mean 10.1 18.3 29.9 43.6 54.7 63.2 68.4 66.9 55.0 43.3 26.7 14.9 41.3 Precip. 0.35 0.32 0.58 0.76 1.89 2.38 1.56 1.08 1.15 0.68 0.55 0.41 11.71 HDD 1704 1308 1088 643 325 122 47 100 326 675 1151 1554 9043 CDD 0 0 0 0 7 68 151 157 25 0 0 0 408 City:ST IGNATIUS State:MT Lat:47.19N Long:114.06W Elev: 2900 ID:247286 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 19.4 22.6 28.2 33.8 40.5 47.1 50.8 50.3 42.6 34.0 26.8 20.1 34.7 Maximum 33.8 39.6 49.4 59.3 67.7 75.3 83.2 83.5 71.8 58.2 42.1 34.0 58.2 Mean 26.6 31.1 38.8 46.6 54.1 61.2 67.0 66.9 57.2 46.1 34.5 27.1 46.4 Precip. 0.99 0.77 1.16 1.42 2.59 2.30 1.39 1.28 1.36 1.18 1.03 1.07 16.54 HDD 1190 949 812 553 342 157 69 59 254 586 916 1177 7064 CDD 0 0 0 0 3 44 132 117 18 0 0 0 314 City:ST MARY State:MT Lat:48.44N Long:113.26W Elev: 4560 ID:247292 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 10.9 15.6 21.1 28.4 35.3 41.9 45.7 44.5 37.7 32.0 22.1 14.7 29.2 Maximum 31.0 36.7 43.1 53.4 63.0 70.8 78.7 79.7 69.0 55.8 38.8 31.9 54.3 Mean 21.0 26.2 32.1 40.9 49.2 56.4 62.2 62.1 53.4 43.9 30.5 23.3 41.8 Precip. 2.23 1.74 1.80 1.85 2.77 3.07 1.67 1.55 2.05 2.12 2.55 2.22 25.62 HDD 1364 1088 1021 723 491 269 140 156 369 654 1037 1294 8606 CDD 0 0 0 0 0 9 52 67 18 0 0 0 146 City:SAINT REGIS 1 NE State:MT Lat:47.18N Long:115.05W Elev: 2660 ID:247318 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 16.1 19.5 25.3 31.1 36.6 43.2 45.8 45.0 37.5 30.0 23.8 17.7 31.0 Maximum 31.2 38.1 48.0 58.0 67.2 75.3 83.7 84.1 73.1 58.0 39.8 31.5 57.3 Mean 23.7 28.8 36.7 44.6 51.9 59.3 64.8 64.6 55.3 44.0 31.8 24.6 44.2 Precip. 2.22 1.71 1.38 1.44 1.82 1.66 1.14 1.26 1.30 1.56 2.23 2.27 19.99 HDD 1282 1015 879 614 411 190 94 93 304 652 995 1253 7782 CDD 0 0 0 0 4 19 86 79 12 0 0 0 200 City:SAVAGE State:MT Lat:47.27N Long:104.20W Elev: 1985 ID:247382 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 3.5 11.5 20.8 31.8 43.3 52.3 56.7 55.0 44.3 33.7 19.5 8.0 31.7 Maximum 25.0 33.4 45.4 59.9 71.6 80.5 87.2 86.6 74.6 60.9 40.4 28.8 57.9 Mean 14.3 22.5 33.1 45.9 57.5 66.4 72.0 70.8 59.5 47.3 30.0 18.4 44.8 Precip. 0.35 0.29 0.53 1.09 2.01 2.89 2.18 1.30 1.42 1.01 0.50 0.39 13.96 HDD 1573 1191 989 576 267 94 25 47 214 549 1051 1445 8021 CDD 0 0 0 1 33 137 239 227 47 0 0 0 684 City:SCOBEY 4 NW State:MT Lat:48.50N Long:105.29W Elev: 2370 ID:247425 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum -3.6 5.5 16.6 27.5 38.6 47.8 51.1 49.3 37.7 28.1 12.6 1.1 26.0 Maximum 19.3 27.7 39.4 56.3 68.1 77.0 81.6 82.3 70.5 56.7 36.0 23.8 53.2 Mean 7.9 16.6 28.0 41.9 53.4 62.4 66.4 65.8 54.1 42.4 24.3 12.5 39.6 Precip. 0.26 0.14 0.54 0.83 1.72 3.02 2.13 1.64 0.88 0.65 0.34 0.33 12.48 HDD 1774 1355 1147 693 370 146 68 106 347 702 1221 1629 9558 CDD 0 0 0 0 9 68 110 131 20 0 0 0 338 City:SEELEY LAKE R S State:MT Lat:47.13N Long:113.31W Elev: 4100 ID:247448 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 10.6 13.8 21.1 28.0 35.5 41.9 44.7 44.1 36.5 29.4 21.6 12.2 28.3 Maximum 29.7 36.6 44.3 54.1 63.4 71.7 80.6 81.4 70.4 56.7 38.2 29.3 54.7 Mean 20.2 25.2 32.7 41.1 49.5 56.8 62.7 62.8 53.5 43.1 29.9 20.8 41.5 Precip. 2.44 1.65 1.30 1.06 1.98 2.17 1.21 1.39 1.32 1.36 2.24 2.54 20.66 HDD 1391 1115 1001 719 483 255 132 128 356 680 1053 1372 8685 CDD 0 0 0 0 0 10 58 57 9 0 0 0 134 City:SHONKIN 7 S State:MT Lat:47.32N Long:110.35W Elev: 4300 ID:247540 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 13.8 18.5 24.4 31.8 39.7 46.1 50.3 49.7 42.7 34.5 24.9 18.0 32.9 Maximum 34.1 38.2 44.6 53.8 61.9 70.8 78.8 79.2 68.1 57.1 42.3 35.6 55.4 Mean 24.0 28.4 34.5 42.8 50.8 58.5 64.6 64.5 55.4 45.8 33.6 26.8 44.1 Precip. 1.25 0.98 2.03 2.60 4.43 3.98 2.16 1.96 2.72 1.85 1.30 1.20 26.46 HDD 1274 1026 946 667 442 224 113 131 323 594 942 1184 7866 CDD 0 0 0 0 1 28 100 114 33 0 0 0 276 City:SIDNEY State:MT Lat:47.44N Long:104.09W Elev: 1920 ID:247560 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 2.7 10.7 20.6 31.6 43.3 52.1 56.1 54.6 44.0 33.6 19.4 7.5 31.4 Maximum 24.5 33.0 45.6 60.9 72.6 80.6 86.3 85.9 74.0 60.3 40.0 28.1 57.7 Mean 13.6 21.9 33.1 46.3 58.0 66.4 71.2 70.3 59.0 47.0 29.7 17.8 44.5 Precip. 0.41 0.36 0.56 1.07 2.02 2.80 2.14 1.31 1.50 1.02 0.63 0.49 14.31 HDD 1594 1207 989 564 255 84 24 48 221 560 1060 1463 8069 CDD 0 0 0 2 36 124 217 211 42 0 0 0 632 City:SIMMS 1 NE State:MT Lat:47.30N Long:111.55W Elev: 3590 ID:247618 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.35 0.36 0.55 1.09 1.95 2.16 1.44 1.47 1.16 0.70 0.41 0.30 11.94 City:SIMPSON 6 NW State:MT Lat:48.59N Long:110.18W Elev: 2740 ID:247620 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 1.6 8.3 18.6 29.1 38.8 46.6 50.5 49.7 38.9 28.7 15.4 5.0 27.6 Maximum 24.3 32.0 43.7 58.4 69.7 78.0 85.1 84.7 72.5 58.9 39.2 28.3 56.2 Mean 13.0 20.2 31.2 43.8 54.3 62.3 67.8 67.2 55.7 43.8 27.3 16.7 41.9 Precip. 0.33 0.24 0.49 0.66 1.76 2.07 1.37 1.38 1.09 0.49 0.39 0.34 10.61 HDD 1613 1255 1048 638 340 140 55 86 310 658 1132 1498 8773 CDD 0 0 0 0 7 59 142 154 31 0 0 0 393 City:SONNETTE 2 WNW State:MT Lat:45.25N Long:105.52W Elev: 3900 ID:247740 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 3.7 10.1 19.1 28.5 37.7 46.1 51.3 50.0 39.2 29.4 16.1 6.2 28.1 Maximum 30.9 36.8 44.9 55.0 65.0 75.3 84.0 83.6 71.5 58.8 41.8 32.7 56.7 Mean 17.3 23.5 32.0 41.8 51.4 60.7 67.7 66.8 55.4 44.1 29.0 19.5 42.4 Precip. 0.52 0.42 0.79 1.61 2.53 2.51 1.65 1.04 1.25 1.29 0.67 0.50 14.78 HDD 1479 1164 1023 697 426 185 59 82 311 648 1082 1412 8568 CDD 0 0 0 0 3 56 141 139 22 0 0 0 361 City:SPRINGDALE State:MT Lat:45.44N Long:110.14W Elev: 4221 ID:247800 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.54 0.35 0.85 1.57 2.65 2.06 1.33 1.13 1.40 1.19 0.60 0.50 14.17 City:STANFORD State:MT Lat:47.09N Long:110.13W Elev: 4860 ID:247864 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 12.9 17.1 23.5 31.3 39.4 46.8 51.6 51.3 42.5 33.5 22.2 14.9 32.3 Maximum 35.2 39.5 45.6 55.3 64.4 73.0 80.3 80.8 70.3 59.4 44.1 37.0 57.1 Mean 24.1 28.3 34.6 43.3 51.9 59.9 66.0 66.1 56.4 46.5 33.2 26.0 44.7 Precip. 0.69 0.48 0.98 1.54 2.84 2.86 2.13 1.86 1.46 0.98 0.63 0.68 17.13 HDD 1270 1027 945 651 409 187 80 107 292 575 956 1211 7710 CDD 0 0 0 0 2 35 109 139 35 0 0 0 320 City:STEVENSVILLE State:MT Lat:46.31N Long:114.05W Elev: 3375 ID:247894 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 16.7 20.0 25.7 31.0 38.2 45.0 48.0 46.5 38.8 30.7 23.7 16.7 31.8 Maximum 34.1 41.2 50.7 60.1 68.1 75.6 83.4 83.5 73.0 60.0 43.2 34.0 58.9 Mean 25.4 30.6 38.2 45.6 53.2 60.3 65.7 65.0 55.9 45.4 33.5 25.4 45.4 Precip. 1.14 0.88 0.76 0.89 1.50 1.47 0.87 1.07 0.97 0.71 1.12 1.11 12.49 HDD 1228 964 832 585 369 164 73 75 283 608 947 1229 7357 CDD 0 0 0 0 2 23 94 74 10 0 0 0 203 City:SULA 3 ENE State:MT Lat:45.51N Long:113.56W Elev: 4475 ID:247964 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 9.7 14.0 21.0 26.5 32.5 38.1 40.3 39.2 31.6 24.7 18.7 10.6 25.6 Maximum 32.3 39.3 47.0 55.3 63.3 71.6 80.2 79.8 70.2 57.9 40.9 31.6 55.8 Mean 21.0 26.7 34.0 40.9 47.9 54.9 60.3 59.5 50.9 41.3 29.8 21.1 40.7 Precip. 0.96 0.80 0.99 1.50 2.25 2.20 1.39 1.41 1.22 1.17 1.18 0.97 16.04 HDD 1365 1074 961 723 530 306 170 189 426 734 1057 1361 8896 CDD 0 0 0 0 0 2 21 18 2 0 0 0 43 City:SUNBURST 8 E State:MT Lat:48.53N Long:111.44W Elev: 3700 ID:247996 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 9.5 14.5 22.3 31.3 40.1 47.2 51.3 51.4 41.9 32.9 20.2 12.2 31.2 Maximum 29.5 35.6 44.2 56.5 66.1 73.5 80.7 80.4 70.0 57.9 40.2 31.7 55.5 Mean 19.5 25.1 33.3 43.9 53.1 60.4 66.0 65.9 56.0 45.4 30.2 22.0 43.4 Precip. 0.37 0.30 0.77 1.01 2.18 2.46 1.60 1.62 1.19 0.65 0.51 0.39 13.05 HDD 1411 1119 985 633 371 173 82 108 310 608 1044 1334 8178 CDD 0 0 0 0 2 34 112 136 38 0 0 0 322 City:SUN RIVER 4 S State:MT Lat:47.29N Long:111.44W Elev: 3600 ID:248021 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 11.9 16.2 22.2 30.4 38.7 46.3 49.8 48.8 40.4 33.0 22.8 14.7 31.3 Maximum 34.3 40.0 47.4 57.3 66.0 74.0 81.5 80.8 70.3 59.5 43.4 35.8 57.5 Mean 23.1 28.1 34.8 43.9 52.4 60.2 65.7 64.8 55.4 46.3 33.1 25.3 44.4 Precip. 0.42 0.36 0.67 1.24 2.18 2.08 1.47 1.51 1.06 0.81 0.49 0.42 12.71 HDD 1299 1033 936 634 392 178 79 110 312 582 957 1232 7744 CDD 0 0 0 0 1 33 98 103 22 0 0 0 257 City:SUPERIOR State:MT Lat:47.12N Long:114.53W Elev: 2710 ID:248043 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 19.5 22.1 27.3 32.4 39.1 45.7 49.4 49.0 41.0 33.2 26.8 20.3 33.8 Maximum 35.0 43.0 52.8 61.9 70.4 77.9 86.6 86.8 75.9 61.2 42.6 33.7 60.7 Mean 27.3 32.6 40.1 47.2 54.8 61.8 68.0 67.9 58.5 47.2 34.7 27.0 47.3 Precip. 1.48 1.14 1.26 1.19 1.86 1.75 1.05 1.32 1.10 1.14 1.66 1.63 16.58 HDD 1171 908 773 536 322 139 51 49 227 552 910 1178 6816 CDD 0 0 0 0 4 43 145 140 29 0 0 0 361 City:SWAN LAKE State:MT Lat:47.55N Long:113.50W Elev: 3100 ID:248087 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 12.2 16.0 22.1 28.7 35.8 41.4 44.2 42.8 35.6 27.8 21.1 15.0 28.6 Maximum 28.3 35.5 44.5 55.0 64.5 70.9 78.2 77.7 67.1 54.0 36.5 29.0 53.4 Mean 20.3 25.8 33.3 41.9 50.2 56.2 61.2 60.3 51.4 40.9 28.8 22.0 41.0 Precip. 2.98 2.38 1.94 1.65 2.60 2.75 1.53 1.73 1.96 2.15 3.53 3.54 28.74 HDD 1386 1099 983 695 460 273 165 191 412 747 1087 1333 8831 CDD 0 0 0 0 0 6 48 43 2 0 0 0 99 City:SWEETGRASS State:MT Lat:49.00N Long:111.58W Elev: 3466 ID:248093 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 8.4 13.4 21.6 31.0 40.3 47.8 51.9 51.2 42.1 32.6 20.0 11.3 31.0 Maximum 30.4 36.1 44.6 56.6 66.4 74.1 80.8 81.2 70.9 59.4 41.3 32.5 56.2 Mean 19.4 24.8 33.1 43.8 53.4 61.0 66.4 66.2 56.5 46.0 30.7 21.9 43.6 Precip. 0.30 0.23 0.58 1.00 2.61 3.13 1.96 1.94 1.45 0.62 0.45 0.30 14.57 HDD 1413 1127 988 636 365 162 82 101 296 589 1030 1336 8125 CDD 0 0 0 0 4 40 122 137 40 0 0 0 343 City:TERRY State:MT Lat:46.48N Long:105.18W Elev: 2248 ID:248165 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 2.3 10.2 19.9 31.1 42.2 52.3 57.0 55.0 42.9 31.1 17.7 6.1 30.7 Maximum 28.0 35.8 47.0 59.9 71.1 80.9 88.7 88.2 75.6 61.5 43.2 32.4 59.4 Mean 15.2 23.0 33.5 45.5 56.7 66.6 72.9 71.6 59.3 46.3 30.5 19.3 45.0 Precip. 0.31 0.24 0.43 1.06 1.92 2.15 1.55 1.29 1.28 0.94 0.44 0.24 11.85 HDD 1545 1176 979 585 280 89 17 49 224 579 1037 1419 7979 CDD 0 0 0 0 21 137 261 254 51 0 0 0 724 City:TERRY 21 NNW State:MT Lat:47.04N Long:105.30W Elev: 3255 ID:248169 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 3.7 10.2 18.8 28.5 38.9 48.0 53.0 51.9 40.7 29.6 16.4 6.6 28.9 Maximum 24.9 31.3 41.5 54.6 65.6 75.0 82.4 81.9 69.6 56.3 38.3 28.0 54.1 Mean 14.3 20.8 30.2 41.6 52.3 61.5 67.7 66.9 55.2 43.0 27.4 17.3 41.5 Precip. 0.44 0.28 0.54 1.20 2.18 2.62 1.86 1.22 1.36 1.04 0.48 0.45 13.67 HDD 1572 1240 1080 704 403 173 71 100 324 683 1130 1479 8959 CDD 0 0 0 0 9 69 155 157 29 0 0 0 419 City:THOMPSON FALLS POWER HS State:MT Lat:47.35N Long:115.21W Elev: 2380 ID:248211 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 21.6 24.5 29.0 34.1 40.8 47.2 50.9 50.4 42.4 34.5 28.8 22.8 35.6 Maximum 35.1 42.5 52.3 62.5 71.0 78.4 87.5 88.1 77.0 61.4 42.9 34.8 61.1 Mean 28.4 33.5 40.7 48.3 55.9 62.8 69.2 69.3 59.7 48.0 35.9 28.8 48.4 Precip. 2.59 2.04 1.78 1.51 2.27 2.17 1.22 1.22 1.20 1.66 2.66 2.75 23.07 HDD 1136 883 755 501 292 122 45 38 200 527 874 1123 6496 CDD 0 0 0 0 10 54 177 169 40 0 0 0 450 City:TIBER DAM State:MT Lat:48.19N Long:111.05W Elev: 2850 ID:248233 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 8.1 13.1 22.6 31.3 41.1 48.7 52.5 51.4 41.8 32.1 20.1 11.1 31.2 Maximum 32.0 38.8 48.9 60.8 70.5 78.6 85.5 85.5 74.9 63.7 45.2 34.6 59.9 Mean 20.1 26.0 35.8 46.1 55.8 63.7 69.0 68.5 58.4 47.9 32.7 22.9 45.6 Precip. 0.34 0.23 0.54 0.86 1.70 2.06 1.19 1.30 0.85 0.60 0.38 0.32 10.37 HDD 1393 1092 906 569 295 115 44 64 240 531 971 1306 7526 CDD 0 0 0 1 9 73 168 170 40 0 0 0 461 City:TOWNSEND State:MT Lat:46.20N Long:111.32W Elev: 3840 ID:248324 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 12.6 16.9 24.3 31.3 39.3 46.6 50.8 49.0 40.2 31.7 22.2 13.7 31.6 Maximum 34.5 41.1 50.3 59.9 68.2 75.8 82.5 82.4 72.4 61.0 44.7 35.6 59.0 Mean 23.6 29.0 37.3 45.6 53.8 61.2 66.7 65.7 56.3 46.4 33.5 24.7 45.3 Precip. 0.35 0.23 0.54 0.71 1.73 2.03 1.36 1.36 1.01 0.60 0.40 0.35 10.67 HDD 1286 1008 858 582 352 156 70 80 279 577 947 1251 7446 CDD 0 0 0 0 2 41 121 102 19 0 0 0 285 City:TRIDENT State:MT Lat:45.57N Long:111.28W Elev: 4036 ID:248363 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 11.8 17.1 24.3 31.3 39.7 46.9 51.4 49.7 40.3 31.7 21.1 12.7 31.5 Maximum 34.0 40.6 48.8 58.8 68.2 77.5 85.5 85.2 73.8 60.9 43.5 35.0 59.3 Mean 22.9 28.9 36.6 45.1 54.0 62.2 68.5 67.5 57.1 46.3 32.3 23.9 45.4 Precip. 0.37 0.29 0.71 1.15 2.33 2.16 1.50 1.18 1.41 0.92 0.54 0.29 12.85 HDD 1305 1011 882 598 346 144 53 60 262 579 981 1276 7497 CDD 0 0 0 0 4 60 159 136 24 0 0 0 383 City:TROUT CREEK R S State:MT Lat:47.52N Long:115.37W Elev: 2356 ID:248380 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 19.3 22.1 26.7 31.5 37.7 43.6 46.4 46.0 39.9 33.3 28.5 21.2 33.0 Maximum 34.3 41.0 50.4 60.7 69.1 76.0 84.2 85.3 74.8 60.0 42.0 33.9 59.3 Mean 26.8 31.6 38.6 46.1 53.4 59.8 65.3 65.7 57.4 46.7 35.3 27.6 46.2 Precip. 3.67 2.74 2.21 1.84 2.35 2.26 1.39 1.35 1.40 1.97 3.89 3.90 28.97 HDD 1185 937 820 567 359 177 91 79 248 569 892 1161 7085 CDD 0 0 0 0 1 21 101 99 19 0 0 0 241 City:TROY State:MT Lat:48.29N Long:115.54W Elev: 1929 ID:248390 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 19.8 23.0 27.6 33.1 40.5 46.6 50.0 48.9 41.6 34.4 28.9 21.7 34.7 Maximum 32.7 39.6 49.9 60.8 68.9 76.3 84.7 85.2 73.5 58.2 40.5 32.9 58.6 Mean 26.3 31.3 38.8 47.0 54.7 61.5 67.4 67.1 57.6 46.3 34.7 27.3 46.7 Precip. 3.00 2.29 1.90 1.63 2.04 1.97 1.38 1.19 1.30 1.89 3.66 3.21 25.46 HDD 1202 943 815 542 323 137 60 62 249 581 909 1169 6992 CDD 0 0 0 0 4 30 133 125 25 0 0 0 317 City:TROY 18 N State:MT Lat:48.43N Long:115.53W Elev: 2715 ID:248395 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 16.8 20.2 24.5 29.7 36.9 43.1 46.7 46.2 39.0 31.7 25.2 18.3 31.5 Maximum 30.5 38.0 46.7 57.9 68.0 74.6 82.2 83.1 72.0 57.1 38.7 30.1 56.6 Mean 23.7 29.1 35.6 43.8 52.5 58.9 64.5 64.7 55.5 44.4 32.0 24.2 44.1 Precip. 4.21 3.16 2.73 2.48 2.61 2.67 1.63 1.44 1.97 3.03 4.81 4.71 35.45 HDD 1282 1005 912 636 393 203 99 86 298 638 991 1265 7808 CDD 0 0 0 0 4 20 81 75 13 0 0 0 193 City:TURNER 11 N State:MT Lat:49.00N Long:108.23W Elev: 2982 ID:248415 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 0.7 7.5 18.4 28.6 39.1 47.3 50.9 49.8 40.2 30.4 16.1 5.4 27.9 Maximum 23.1 30.0 41.9 56.9 67.4 75.8 81.8 82.6 70.7 58.0 37.8 26.4 54.4 Mean 11.9 18.8 30.2 42.8 53.3 61.6 66.4 66.2 55.5 44.2 27.0 15.9 41.2 Precip. 0.29 0.18 0.39 0.54 1.76 2.61 1.85 0.96 1.28 0.44 0.59 0.36 11.25 HDD 1646 1294 1080 667 372 155 69 105 316 645 1141 1523 9013 CDD 0 0 0 0 7 51 112 142 29 0 0 0 341 City:TWIN BRIDGES State:MT Lat:45.33N Long:112.20W Elev: 4625 ID:248430 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 10.5 14.2 20.8 27.2 35.2 42.0 45.5 43.2 35.1 27.1 18.5 11.0 27.5 Maximum 34.4 40.5 48.4 57.7 66.6 75.6 83.3 82.2 72.0 60.3 43.3 34.5 58.2 Mean 22.5 27.4 34.6 42.5 50.9 58.8 64.4 62.7 53.6 43.7 30.9 22.8 42.9 Precip. 0.22 0.18 0.48 0.85 1.86 1.80 1.19 1.07 1.06 0.61 0.36 0.23 9.91 HDD 1320 1055 942 676 437 202 91 116 349 660 1023 1309 8180 CDD 0 0 0 0 0 17 72 45 5 0 0 0 139 City:VALENTINE State:MT Lat:47.20N Long:108.30W Elev: 2910 ID:248498 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 1.1 9.2 19.0 29.1 38.8 47.6 51.5 50.5 38.8 27.8 14.9 5.6 27.8 Maximum 29.5 37.2 46.6 57.4 67.2 76.7 84.2 83.7 71.6 59.9 43.0 32.9 57.5 Mean 15.3 23.2 32.8 43.3 53.0 62.2 67.9 67.1 55.2 43.9 29.0 19.3 42.7 Precip. 0.62 0.32 0.71 1.15 2.78 1.85 1.85 1.43 1.04 0.69 0.52 0.54 13.50 HDD 1540 1171 999 653 377 140 59 91 322 657 1082 1418 8509 CDD 0 0 0 0 5 55 149 156 27 0 0 0 392 City:VALIER State:MT Lat:48.19N Long:112.15W Elev: 3810 ID:248501 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 11.5 15.8 22.8 31.4 40.4 48.1 52.5 51.8 43.1 34.1 22.1 14.7 32.4 Maximum 32.3 37.3 44.4 55.2 64.6 72.5 79.6 80.0 69.9 58.9 41.5 34.0 55.9 Mean 21.9 26.6 33.6 43.3 52.5 60.3 66.1 65.9 56.5 46.5 31.8 24.4 44.1 Precip. 0.31 0.24 0.50 0.92 2.24 2.63 1.33 1.65 1.14 0.60 0.37 0.29 12.22 HDD 1336 1077 973 651 390 174 74 95 290 575 995 1261 7891 CDD 0 0 0 0 2 33 106 123 34 0 0 0 298 City:VIDA 6 NE State:MT Lat:47.53N Long:105.27W Elev: 2400 ID:248569 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 2.8 11.0 20.6 31.3 41.9 50.5 55.0 53.6 42.7 32.3 18.5 7.4 30.6 Maximum 24.7 33.0 44.1 59.1 70.5 79.4 86.0 85.6 73.1 59.4 40.0 28.8 57.0 Mean 13.8 22.0 32.4 45.2 56.2 65.0 70.5 69.6 57.9 45.9 29.3 18.1 43.8 Precip. 0.45 0.32 0.66 1.14 2.03 2.70 1.98 1.27 1.34 0.97 0.57 0.45 13.88 HDD 1588 1205 1012 595 294 101 35 77 260 594 1073 1454 8288 CDD 0 0 0 1 20 100 205 220 47 0 0 0 593 City:VIRGINIA CITY State:MT Lat:45.18N Long:111.57W Elev: 5773 ID:248597 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 12.1 15.1 21.0 27.7 35.9 42.8 48.5 47.5 39.0 30.2 19.6 12.6 29.3 Maximum 33.7 38.0 44.0 52.7 61.3 71.0 79.2 78.7 68.5 57.0 41.1 34.1 54.9 Mean 22.9 26.6 32.5 40.2 48.6 56.9 63.9 63.1 53.8 43.6 30.4 23.4 42.2 Precip. 0.74 0.55 1.02 1.44 2.58 2.48 1.64 1.45 1.26 1.08 0.90 0.68 15.82 HDD 1304 1076 1007 744 509 255 117 125 351 663 1039 1292 8482 CDD 0 0 0 0 0 12 82 65 13 0 0 0 172 City:VOLBORG State:MT Lat:45.51N Long:105.41W Elev: 2980 ID:248607 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.52 0.31 0.75 1.76 2.48 2.31 1.47 0.98 1.24 1.26 0.64 0.51 14.23 City:WARRICK 2 NW State:MT Lat:48.05N Long:109.39W Elev: 4250 ID:248693 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.97 0.53 0.98 1.39 2.36 3.53 1.72 1.45 1.30 0.89 0.92 1.23 17.27 City:WEBSTER 3 E State:MT Lat:46.03N Long:104.11W Elev: 3140 ID:248732 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.44 0.34 0.67 1.44 2.50 3.04 1.86 1.26 1.33 1.39 0.62 0.37 15.26 City:WESTBY State:MT Lat:48.52N Long:104.03W Elev: 2105 ID:248777 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum -4.5 3.7 15.1 28.3 41.2 50.5 54.6 52.1 40.3 28.9 14.0 1.0 27.1 Maximum 16.9 24.9 36.6 53.2 65.6 73.9 79.5 79.3 67.3 54.6 34.2 21.9 50.7 Mean 6.2 14.3 25.9 40.8 53.4 62.2 67.1 65.7 53.8 41.8 24.1 11.5 38.9 Precip. 0.39 0.26 0.56 0.90 1.76 3.00 2.48 1.55 1.41 0.71 0.40 0.41 13.83 HDD 1825 1420 1213 728 369 155 72 112 353 720 1228 1661 9856 CDD 0 0 0 0 10 71 135 134 16 0 0 0 366 City:WESTERN AG RESEARCH CNT State:MT Lat:46.19N Long:114.07W Elev: 3597 ID:248783 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 17.6 20.8 26.6 31.8 38.5 44.8 48.7 47.6 40.1 32.0 24.1 17.2 32.5 Maximum 35.2 42.2 51.2 60.5 68.5 76.5 84.4 83.9 72.7 60.4 43.5 34.6 59.5 Mean 26.4 31.5 38.9 46.2 53.5 60.7 66.6 65.8 56.4 46.2 33.8 25.9 46.0 Precip. 0.71 0.54 0.68 0.99 1.72 1.62 0.94 1.14 1.03 0.77 0.80 0.75 11.69 HDD 1197 938 809 566 359 162 62 70 275 583 936 1213 7170 CDD 0 0 0 0 2 31 110 93 17 0 0 0 253 City:WEST GLACIER State:MT Lat:48.30N Long:113.59W Elev: 3154 ID:248809 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 15.5 18.7 24.2 30.3 37.7 44.1 48.2 47.4 39.1 31.7 25.0 18.0 31.7 Maximum 29.3 34.8 43.1 54.2 64.5 71.8 78.9 78.8 67.1 53.4 37.0 29.6 53.5 Mean 22.4 26.8 33.7 42.3 51.1 58.0 63.6 63.1 53.1 42.6 31.0 23.8 42.6 Precip. 3.16 2.19 1.83 1.78 2.66 3.22 1.97 1.67 1.87 2.07 3.10 3.22 28.74 HDD 1320 1070 972 683 431 223 114 123 362 695 1019 1278 8290 CDD 0 0 0 0 0 12 70 63 5 0 0 0 150 City:WEST YELLOWSTONE State:MT Lat:44.39N Long:111.06W Elev: 6659 ID:248857 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 1.4 4.2 11.9 20.6 29.3 36.3 40.7 38.5 30.1 21.9 10.8 1.2 20.6 Maximum 23.9 30.3 38.2 46.8 58.3 68.8 77.7 76.7 65.5 51.7 32.8 23.6 49.5 Mean 12.7 17.3 25.1 33.7 43.8 52.6 59.2 57.6 47.8 36.8 21.8 12.4 35.1 Precip. 1.96 1.77 1.82 1.51 2.19 2.21 1.84 1.36 1.47 1.30 2.01 2.30 21.74 HDD 1623 1336 1238 940 658 376 199 244 517 875 1296 1632 10934 CDD 0 0 0 0 0 2 19 13 1 0 0 0 35 City:WHITEFISH State:MT Lat:48.25N Long:114.22W Elev: 3100 ID:248902 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 12.9 15.4 22.3 29.3 37.4 44.4 48.7 47.8 38.1 29.6 22.9 15.8 30.4 Maximum 29.4 35.8 44.2 55.9 64.9 71.7 80.1 80.3 68.7 55.2 37.8 30.3 54.5 Mean 21.2 25.6 33.3 42.6 51.2 58.1 64.4 64.1 53.4 42.4 30.4 23.1 42.5 Precip. 1.87 1.44 1.23 1.43 2.48 2.87 1.97 1.49 1.21 1.03 2.00 2.10 21.12 HDD 1359 1103 985 672 429 222 100 112 359 701 1039 1301 8382 CDD 0 0 0 0 0 14 82 83 10 0 0 0 189 City:WHITE SULPHUR SPRNGS 2 State:MT Lat:46.33N Long:110.54W Elev: 5040 ID:248930 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 11.0 14.6 20.7 27.8 35.5 42.7 47.2 46.0 37.9 29.9 19.6 11.9 28.7 Maximum 31.5 36.6 43.9 53.5 62.8 71.7 79.8 79.8 69.0 57.1 40.4 33.3 55.0 Mean 21.3 25.6 32.3 40.7 49.2 57.2 63.5 62.9 53.5 43.5 30.0 22.6 41.9 Precip. 0.47 0.38 0.84 1.18 2.29 2.21 1.52 1.20 1.23 0.99 0.44 0.47 13.22 HDD 1357 1103 1013 731 493 252 123 136 360 667 1050 1315 8600 CDD 0 0 0 0 0 18 77 72 13 0 0 0 180 City:WHITEWATER State:MT Lat:48.46N Long:107.37W Elev: 2355 ID:248939 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.35 0.30 0.45 0.71 1.86 2.35 1.60 0.90 1.01 0.58 0.44 0.36 10.91 City:WIBAUX 2 E State:MT Lat:46.59N Long:104.09W Elev: 2670 ID:248957 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 2.1 9.6 18.2 28.3 39.0 47.9 51.9 51.1 40.0 29.9 16.8 6.2 28.4 Maximum 24.4 32.0 42.6 56.0 67.7 77.1 84.5 84.1 71.7 57.9 38.7 27.7 55.4 Mean 13.3 20.8 30.4 42.2 53.4 62.5 68.2 67.6 55.9 43.9 27.8 17.0 41.9 Precip. 0.29 0.29 0.59 1.31 2.29 2.56 2.02 1.50 1.49 1.21 0.47 0.25 14.27 HDD 1604 1238 1073 685 372 153 56 83 306 655 1118 1490 8833 CDD 0 0 0 0 11 79 156 164 30 0 0 0 440 City:WILSALL 8 ENE State:MT Lat:46.02N Long:110.31W Elev: 5835 ID:249023 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 12.6 15.6 20.5 26.8 34.4 40.8 44.9 44.0 36.5 29.3 20.1 14.0 28.3 Maximum 33.8 37.7 43.6 52.0 61.4 70.7 79.0 79.1 68.2 56.5 40.7 34.5 54.8 Mean 23.2 26.7 32.1 39.4 47.9 55.8 62.0 61.6 52.4 42.9 30.4 24.3 41.6 Precip. 0.93 0.75 1.51 2.10 3.46 3.27 2.00 1.74 1.83 1.40 1.07 0.90 20.96 HDD 1295 1074 1022 768 531 287 150 163 390 685 1038 1263 8666 CDD 0 0 0 0 0 9 55 56 10 0 0 0 130 City:WINIFRED State:MT Lat:47.34N Long:109.23W Elev: 3243 ID:249033 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 5.5 12.0 20.3 30.2 39.5 47.5 51.2 50.1 39.9 28.9 17.7 8.7 29.3 Maximum 29.8 36.9 45.1 56.2 65.7 75.3 82.6 83.3 71.3 59.1 42.5 33.4 56.8 Mean 17.7 24.5 32.7 43.2 52.6 61.4 66.9 66.7 55.6 44.0 30.1 21.1 43.0 Precip. 0.73 0.42 0.88 1.33 2.76 2.79 1.89 1.66 1.34 0.80 0.59 0.72 15.91 HDD 1468 1136 1001 654 388 157 66 97 313 651 1047 1362 8340 CDD 0 0 0 0 3 49 125 150 31 0 0 0 358 City:WISDOM State:MT Lat:45.37N Long:113.27W Elev: 6060 ID:249067 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 0.4 2.5 11.9 20.4 28.0 35.0 36.6 33.9 26.3 19.2 10.8 1.4 18.9 Maximum 27.6 32.6 40.8 50.7 60.6 69.9 78.6 78.2 68.0 55.7 37.5 28.0 52.4 Mean 14.0 17.6 26.4 35.6 44.3 52.5 57.6 56.1 47.2 37.5 24.2 14.7 35.6 Precip. 0.62 0.51 0.67 0.98 1.70 1.78 1.28 1.12 0.99 0.74 0.81 0.70 11.90 HDD 1580 1330 1199 884 642 378 237 282 535 855 1226 1560 10708 CDD 0 0 0 0 0 0 8 4 0 0 0 0 12 City:WISE RIVER 3 WNW State:MT Lat:45.48N Long:113.01W Elev: 5730 ID:249082 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.52 0.40 0.49 0.72 1.57 1.56 1.36 1.23 1.03 0.77 0.81 0.65 11.11 City:WOLF POINT State:MT Lat:48.06N Long:105.39W Elev: 2090 ID:249103 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum -0.4 7.8 19.3 31.4 43.1 51.6 56.4 55.3 42.6 32.0 17.3 4.1 30.0 Maximum 23.1 31.9 44.7 60.6 72.2 81.2 88.0 87.4 74.9 61.1 41.4 27.7 57.9 Mean 11.4 19.9 32.0 46.0 57.7 66.4 72.2 71.4 58.8 46.6 29.4 15.9 44.0 Precip. 0.45 0.25 0.50 0.79 1.69 2.55 1.87 1.21 1.23 0.70 0.40 0.34 11.98 HDD 1664 1265 1023 573 262 94 30 49 235 572 1071 1523 8361 CDD 0 0 0 4 33 136 252 246 46 0 0 0 717 City:WYOLA 1 SW State:MT Lat:45.07N Long:107.24W Elev: 3730 ID:249175 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 7.7 13.0 21.2 29.4 37.5 45.4 49.4 47.8 38.3 29.6 18.3 9.8 29.0 Maximum 35.6 41.4 50.3 60.6 69.6 78.8 86.4 86.2 74.9 62.7 45.8 37.4 60.8 Mean 21.7 27.2 35.8 45.0 53.6 62.1 67.9 67.0 56.6 46.2 32.1 23.6 44.9 Precip. 0.75 0.66 1.11 2.06 2.69 2.36 1.51 0.83 1.58 1.64 0.96 0.74 16.89 HDD 1343 1059 907 600 358 140 53 79 275 584 989 1283 7670 CDD 0 0 0 0 3 53 142 140 23 0 0 0 361 City:YELLOWTAIL DAM State:MT Lat:45.19N Long:107.56W Elev: 3305 ID:249240 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Minimum 17.7 21.9 28.0 36.2 44.5 52.4 57.2 56.1 47.2 38.5 27.7 20.5 37.3 Maximum 40.2 46.1 54.0 63.4 72.7 82.7 91.0 91.0 79.2 66.1 49.0 41.7 64.8 Mean 29.0 34.0 41.0 49.8 58.6 67.6 74.1 73.6 63.2 52.3 38.4 31.1 51.1 Precip. 0.86 0.72 1.39 2.10 3.09 2.21 1.45 0.98 1.77 1.89 0.95 0.87 18.28 HDD 1118 869 744 460 224 65 11 23 131 395 801 1051 5892 CDD 0 0 0 5 25 142 293 287 77 1 0 0 830 City:ZORTMAN State:MT Lat:47.55N Long:108.32W Elev: 3873 ID:249900 Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precip. 0.68 0.54 1.10 1.73 3.28 3.62 2.34 1.70 1.52 0.67 0.60 0.73 18.51
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