The most pleasant months of the year for the 95721 zip code are July, August and September. In the 95721 zip code, there are 2 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for the 95721 zip code with an average high temperature of 76.3°, which ranks it as cooler than most places in California. March is the snowiest month in the 95721 zip code with 73.1 inches of snow, and 10 months of the year have significant snowfall. There are few days during the year when the humidity is even noticable.