The most pleasant months of the year for Lafayette are May, September and October. In Lafayette, there are 3 comfortable months with high temperatures in the range of 70-85°. August is the hottest month for Lafayette with an average high temperature of 91.2°, which ranks it as about average compared to other places in Kansas. December is the snowiest month in Lafayette with 3.5 inches of snow, and 4 months of the year have significant snowfall. July is the most humid month, though humidity is low for most of the year.