The most pleasant months of the year for Coleman are September, May and June. In Coleman, there are 3 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Coleman with an average high temperature of 89.9°, which ranks it as cooler than most places in Kansas. January is the snowiest month in Coleman with 5.3 inches of snow, and 5 months of the year have significant snowfall. July is the most humid month, though humidity is low for most of the year.