The most pleasant months of the year for the Fairmont metro area are June, August and September. In the Fairmont metro area, there are 5 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for the Fairmont metro area with an average high temperature of 83.1°, which ranks it as warmer than most places in Minnesota. December is the snowiest month in the Fairmont metro area with 11.4 inches of snow, and 6 months of the year have significant snowfall. July is the most humid month, though humidity is low for most of the year.