The most pleasant months of the year for Robinson Mill are October, May and April. In Robinson Mill, there are 3 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Robinson Mill with an average high temperature of 94.9°, which ranks it as warmer than most places in California. December is the snowiest month in Robinson Mill with 0.1 inches of snow, and no months of the year have significant snowfall. There are few days during the summer when the humidity becomes unpleasant.