San Jose Weather Station
Substation of the National Weather Service
Office of Emergency Services
Monthly Meteorological Summary
January 1999
  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 57 37 20 47 49 -2 18 0 30.17 37 45 0.00 3 Variable   47
2 61 35 26 48 49 -1 17 0 30.10 37 40 0.00 Calm   48
3** 64 39 25 52 49 3 13 0 30.24 44 44 0.00 Calm   52
4 56 37 19 47 49 -2 18 0 30.30 39 54 0.00 3 WSW   47
5 58 35 23 47 49 -2 18 0 30.21 37 39 0.00 5 NW   47
6 52 37 15 45 49 -4 20 0 30.16 37 58 0.00 3 Variable   45
7 53 35 18 44 49 -5 21 0 30.15 45 75 0.00 9 NW   44
8 60 36 24 48 49 -1 17 0 30.21 27 28 0.00 14 WNW   48
9 60 35 25 48 49 -1 17 0 30.24 36 47 0.00 6 W   48
10 56 33 23 45 49 -4 20 0 30.11 36 54 0.00 3 NW   45
11 58 35 23 47 49 -2 18 0 30.04 37 45 0.00 3 SE   47
12 57 39 18 48 49 -1 17 0 30.13 43 62 0.00 6 NW   48
13 55 47 8 51 49 2 14 0 30.21 45 69 0.00 6 NW   51
14 60 40 20 50 49 1 15 0 30.25 43 60 0.00 4 WNW   50
15 62 48 14 55 49 6 10 0 30.13 54 78 0.26 3 Variable   55
16** 63 53 10 58 49 9 7 0 30.25 47 62 0.02 3 NNW   58
17 64 53 11 59 49 10 6 0 30.12 52 73 0.00 15 SE   59
18 58 53 5 56 50 6 9 0 30.08 55 88 0.93 8 ESE   56
19 62 55 7 59 50 9 6 0 30.03 54 78 0.32 7 SSE   59
20 58 54 4 56 50 6 9 0 29.90 50 88 0.10 9 SSE   56
21 57 48 9 53 50 3 12 0 30.27 45 65 T 7 NW   53
22 61 47 14 54 50 4 11 0 30.17 39 49 0.00 10 S   54
23** 49 46 3 48 50 -2 17 0 30.10 39 67 0.46 5 SE   48
24** 52 33 19 43 50 -7 22 0 30.04 34 48 0.03 7 NNW   43
25 54 43 11 49 50 -1 16 0 29.91 39 61 0.03 9 ESE   49
26 49 42 7 46 50 -4 19 0 30.03 43 80 0.45 7 NW   46
27 56 35 21 46 50 -4 19 0 30.30 32 39 0.00 8 W   46
28 56 34 22 45 50 -5 20 0 30.28 41 59 0.00 9 WNW   45
29 59 36 23 48 50 -2 17 0 30.14 39 49 0.00 7 WNW   48
30 61 37 24 49 50 -1 16 0 29.93 43 56 0.08 14 S   49
31 52 47 5 50 50 0 15 0 30.16 39 62 0.57 14 W   50
                               
(SUM)AVE 57 41 16 49 49 0 (474) (00) 30.14 42 59 (3.25) ---    
NORMAL 58 41 17 49 49 --- (484) (00) 30.10 --- 76 (2.78) ---     
T = Trace     + = Other Dates     (  ) = Sum Total      *  =  Data Taken at Approximately 4:00 p.m. DST