San Jose Weather Station
Substation of the National Weather Service
Office of Emergency Services
Monthly Meteorological Summary
December 1997

  Temperatures (F)   Moisture Wind
Date Maximum Minimum Range Mean Normal Mean Departure from Normal Heating Degree Days (Base 65o) Cooling Degree Days (Base 65o) Atmospheric Pressure (inches)* Dewpoint* Relative Humidity* Precipitation (Midnight - Midnight) Miles/Direction* (FAA Tower Recording)
1 60 41 19 51 51 0 14 0 29.86 43 53 0.00 8 NW
2 60 40 20 50 51 -1 15 0 29.93 45 64 0.00 6 WNW
3 62 50 12 56 51 5 9 0 29.98 48 66 0.00 5 S
4 64 55 9 60 51 9 5 0 29.79 46 54 0.02 7 SSE
5 62 53 9 58 51 7 7 0 29.62 50 68 0.11 15 ESE
6 61 51 10 56 51 5 9 0 29.59 52 78 0.03 6 SE
7 59 53 6 56 50 6 9 0 29.77 43 67 0.58 5 NNW
8 53 43 10 48 50 -2 17 0 30.09 45 84 0.64 9 NW
9 55 38 17 47 50 -3 18 0 30.42 39 57 0.00 10 W
10 59 38 21 49 50 -1 16 0 30.47 36 45 0.00 14 NW
11 60 37 23 49 50 -1 16 0 30.43 37 45 0.00 6 W
12 53 37 16 45 50 -5 20 0 30.43 41 64 0.00 4 W
13 56 38 18 47 50 -3 18 0 30.17 34 47 0.00 Calm
14 56 51 5 54 50 4 11 0 30.14 49 79 0.45 4 WNW
15 56 40 16 48 50 -2 17 0 30.26 41 59 0.00 5 NNW
16 57 41 16 49 50 -1 16 0 30.25 43 62 0.00 3 NNE
17 61 46 15 54 49 5 11 0 30.03 52 78 0.00 6 SSW
18 59 50 9 55 49 6 10 0 29.94 41 52 0.00 9 WNW
19 59 42 17 51 49 2 14 0 30.07 27 31 0.00 5 NNW
20 59 39 20 49 49 0 16 0 30.05 42 62 0.02 11 NNW
21 55 42 13 49 49 0 16 0 29.96 30 39 0.00 15 NNW
22 55 44 11 50 49 1 15 0 30.03 21 26 0.00 5 NNE
23 56 34 22 45 49 -4 20 0 30.19 27 34 0.00 8 W
24 57 44 13 51 49 2 14 0 30.05 24 27 0.00 14 NW
25 55 41 14 48 48 0 17 0 30.25 23 28 0.00 3 NW
26 55 32 23 44 48 -4 21 0 30.50 30 40 0.00 10 N
27 52 31 21 42 48 -6 23 0 30.42 32 49 0.00 5 N
28 64 37 27 51 48 3 14 0 30.26 34 36 0.00 12 NW
29 61 40 21 51 48 3 14 0 30.10 39 46 0.00 6 NW
30 63 40 23 52 48 4 13 0 30.00 39 43 0.00 4 NW
31 62 46 16 54 48 6 11 0 30.10 35 42 0.00 Calm
                           
(SUM)AVE 58 42 16 50 49 1 (446) (00) 30.10 38 52 (1.85) ---
NORMAL 58 41 17 49 49 --- (493) (00) 30.10 --- 68 (1.99) ---