The most pleasant months of the year for Bad Nation are September, June and May. In Bad Nation, there are 2 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Bad Nation with an average high temperature of 88.2°, which ranks it as one of the hottest places in South Dakota. March is the snowiest month in Bad Nation with 8.8 inches of snow, and 7 months of the year have significant snowfall. There are few days during the summer when the humidity becomes unpleasant.