The most pleasant months of the year for the Carroll metro area are September, June and August. In the Carroll metro area, there are 5 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for the Carroll metro area with an average high temperature of 84.4°, which ranks it as about average compared to other places in Iowa. December is the snowiest month in the Carroll metro area with 7.4 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.