The most pleasant months of the year for Calvert are April, October and May. In Calvert, there are 4 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Calvert with an average high temperature of 91.3°, which ranks it as warmer than most places in Alabama. March is the snowiest month in Calvert with 0.1 inches of snow, and no months of the year have significant snowfall. The most uncomfortably humid months are July, August and June.