San Jose Weather Station
National Weather Service Cooperative Weather Station
January 2009
  Maximum Temperature Minimum Temperature Mean Temperature Heating Degree Days Cooling Degree Days Rainfall
1 51 44 47.5 17 0 0.00
2 55 43 49.0 16 0 0.03
3 53 37 45.0 20 0 0.00
4 53 28 40.5 24 0 0.00
5 49 40 44.5 20 0 T
6 56 45 50.5 14 0 0.00
7 57 44 50.5 14 0 0.00
8 59 43 51.0 14 0 0.00
9 63 38 50.5 14 0 0.00
10 64 36 50.0 15 0 0.00
11 72 34 53.0 12 0 0.00
12 77 56 66.5 0 2 0.00
13 75 44 59.5 5 0 0.00
14 73 40 56.5 8 0 0.00
15 73 41 57.0 8 0 0.00
16 73 40 56.5 8 0 0.00
17 71 40 55.5 9 0 0.00
18 71 38 54.5 10 0 0.00
19 73 39 56.0 9 0 0.00
20 72 41 56.5 8 0 0.00
21 61 50 55.5 9 0 T
22 57 51 54.0 11 0 0.94
23 57 53 55.0 10 0 0.27
24 57 49 53.0 12 0 0.06
25 56 47 51.5 13 0 T
26 56 41 48.5 16 0 0.00
27 58 37 47.5 17 0 0.00
28 60 34 47.0 18 0 0.00
29 68 40 54.0 11 0 0.00
30 67 37 52.0 13 0 0.00
31 65 41 53.0 12 0 0.00
Month 63.0 41.6 52.3 387 2 1.30
Normal 59.3 41.7 50.5 450 0 3.03
Anomaly 3.7 -0.1 1.8 -63 2 -1.73
            43%
Highest 77 56        
Lowest 49 28        

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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