The most pleasant months of the year for German are September, June and May. In German, there are 3 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for German with an average high temperature of 87.9°, which ranks it as warmer than most places in South Dakota. December is the snowiest month in German 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.