The most pleasant months of the year for Corley are September, June and August. In Corley, there are 5 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Corley with an average high temperature of 84.1°, which ranks it as about average compared to other places in Iowa. December is the snowiest month in Corley with 7.0 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.