The most pleasant months of the year for Carl are June, August and July. In Carl, there are 4 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Carl with an average high temperature of 83.2°, which ranks it as cooler than most places in South Dakota. January is the snowiest month in Carl with 7.1 inches of snow, and 7 months of the year have significant snowfall. There are few days during the summer when the humidity becomes unpleasant.