The most pleasant months of the year for Scovil are September, June and May. In Scovil, there are 3 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Scovil with an average high temperature of 88.4°, which ranks it as one of the hottest places in South Dakota. March is the snowiest month in Scovil with 9.3 inches of snow, and 7 months of the year have significant snowfall. There are few days during the summer when the humidity becomes unpleasant.