DISTRICT OF COLUMBIA
Climate Normals (1991-2010)
other states

Source: National Climatic Data Center

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Location: DALECARLIA RSVR               
State: MD
ID: USC00182325
Latitude:   38.9386
Longitude:  -77.1133
Elevation:   45.7 
Normal       Jan     Feb     Mar     Apr     May     Jun     Jul     Aug     Sep     Oct     Nov     Dec     Annual
Maximum      42.9    46.4    54.8    67.6    75.7    84.0    88.2    86.2    79.4    68.0    56.4    46.9
Minimum      25.5    27.3    33.5    43.6    53.7    62.8    68.0    66.3    59.2    46.8    36.4    29.6
Precip       3.32    3.24    4.15    3.53    4.44    4.24    5.11    4.42    4.54    4.40    3.32    3.81    48.52
Snow         2.90    1.40    0.70    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.80     5.80
Location: NATL ARBORETUM DC             
State: MD
ID: USC00186350
Latitude:   38.9133
Longitude:  -76.9700
Elevation:   15.2 
Normal       Jan     Feb     Mar     Apr     May     Jun     Jul     Aug     Sep     Oct     Nov     Dec     Annual
Maximum      44.7    47.8    55.9    67.6    76.9    85.4    89.8    88.4    81.7    69.9    58.4    49.2
Minimum      27.8    29.5    36.5    46.4    56.6    66.1    70.9    68.8    61.5    49.0    38.9    31.9
Precip       3.03    2.77    3.96    3.44    4.32    4.56    4.62    3.67    4.12    4.23    3.20    3.67    45.59
Snow         4.70    2.30    1.40    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00    1.30     9.70
Location: WASHINGTON DC DULLES AP       
State: VA
ID: USW00093738
Latitude:   38.9408
Longitude:  -77.4636
Elevation:   88.4 
Normal       Jan     Feb     Mar     Apr     May     Jun     Jul     Aug     Sep     Oct     Nov     Dec     Annual
Maximum      42.6    46.1    54.8    66.8    75.0    83.1    87.6    86.3    79.3    67.8    56.5    46.5
Minimum      25.2    26.7    33.6    43.2    53.0    61.9    66.8    65.2    57.9    45.3    35.6    29.0
Precip       2.94    2.61    3.50    3.47    4.72    4.30    4.15    3.53    3.94    3.65    3.13    3.30    43.24
Snow         6.90    7.00    3.90    0.10    0.00    0.00    0.00    0.00    0.00    0.00    0.30    2.80    21.00
Location: WASHINGTON REAGAN AP          
State: VA
ID: USW00013743
Latitude:   38.8483
Longitude:  -77.0342
Elevation:    3.0 
Normal       Jan     Feb     Mar     Apr     May     Jun     Jul     Aug     Sep     Oct     Nov     Dec     Annual
Maximum      44.8    48.3    56.5    68.0    76.5    85.1    89.6    87.8    80.7    69.4    58.2    48.8
Minimum      30.1    31.8    38.6    48.4    58.0    67.5    72.4    71.0    64.1    52.2    41.6    34.5
Precip       2.86    2.62    3.50    3.21    3.94    4.20    4.33    3.25    3.93    3.66    2.91    3.41    41.82
Snow         4.90    5.00    2.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.10    1.70    13.70