The most pleasant months of the year for Crystal Plains are May, September and June. In Crystal Plains, there are 2 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Crystal Plains with an average high temperature of 91.8°, which ranks it as warmer than most places in Kansas. February is the snowiest month in Crystal Plains with 5.1 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.