The most pleasant months of the year for Farmer are September, June and May. In Farmer, there are 4 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Farmer with an average high temperature of 86.8°, which ranks it as warmer than most places in South Dakota. December is the snowiest month in Farmer with 6.8 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.