The most pleasant months of the year for Alleghany are September, June and July. In Alleghany, there are 4 comfortable months with high temperatures in the range of 70-85°. August is the hottest month for Alleghany with an average high temperature of 83.9°, which ranks it as cooler than most places in California. January is the snowiest month in Alleghany with 28.3 inches of snow, and 8 months of the year have significant snowfall. Days with noticeable humidity are rare throughout the year.