San Jose Climate Normals

Golden Gate Weather Services
Jan Null, CCM
30-year Normals (1981-2010)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Maximum Temperature 58.1 61.9 65.7 69.3 74.3 79.1 81.9 81.9 80.1 74.0 64.3 58.0 70.8
Mean Temperature 50.1 53.3 56.2 58.9 63.4 67.5 70.0 70.1 68.5 63.2 55.1 50.0 60.6
Minimum Temperature 42.0 44.7 46.6 48.6 52.4 56.0 58.1 58.3 56.8 52.5 46.0 41.9 50.4
Cooling Degree days <0.5 <0.5 2 15 46 101 159 160 116 37 1 0 636
Heating Degree Days 463 328 276 196 97 24 4 2 13 91 297 467 2257
Rainfall 3.07 3.11 2.54 1.18 0.51 0.10 0.02 0.02 0.18 0.80 1.68 2.61 15.82
Snow 0 0 0 0 0 0 0 0 0 0 0 0 0
 

Source: National Climatic Data Center