The most pleasant months of the year for Civil Bend are September, June and May. In Civil Bend, there are 4 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Civil Bend with an average high temperature of 85.4°, which ranks it as about average compared to other places in South Dakota. December is the snowiest month in Civil Bend with 7.3 inches of snow, and 7 months of the year have significant snowfall. July is the most humid month, though humidity is low for most of the year.