San Jose Weather Station
National Weather Service Cooperative Weather Station
December 2009
Maximum Temperature Minimum Temperature Mean Temperature Heating Degree Days Cooling Degree Days Rainfall
1 64 39 51.5 13 0  
2 54 38 46.0 19 0  
3 60 41 50.5 14 0  
4 57 36 46.5 18 0  
5 55 38 46.5 18 0  
6 51 35 43.0 22 0 T
7 47 34 40.5 24 0 0.44
8 48 29 38.5 26 0  
9 47 30 38.5 26 0  
10 50 41 45.5 19 0 0.35
11 56 42 49.0 16 0 0.18
12 63 50 56.5 8 0 0.40
13 57 50 53.5 11 0 0.18
14 59 45 52.0 13 0  
15 60 45 52.5 12 0  
16 63 50 56.5 8 0 T
17 62 47 54.5 10 0  
18 63 45 54.0 11 0  
19 59 44 51.5 13 0  
20 69 42 55.5 9 0 0.02
21 60 47 53.5 11 0 0.20
22 54 38 46.0 19 0  
23 59 40 49.5 15 0  
24 60 34 47.0 18 0  
25 60 33 46.5 18 0  
26 58 39 48.5 16 0 0.27
27 61 45 53.0 12 0 0.03
28 51 45 48.0 17 0 0.06
29 56 37 46.5 18 0 0.03
30 58 49 53.5 11 0  
31 62 49 55.5 9 0  
Month 57.5 41.2 49.4 474 0 2.16
Normal 58.9 41.0 50.0 467 0 2.00
Anomaly -1.4 0.2 -0.6 7 0 0.16
108%
Highest 69 50 56.5
Lowest 47 29 38.5

Note:  Data here is preliminary and is taken from daily temperature and precipitation reports.

This document is offered as a public service from Golden Gate Weather Services. 

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