The most pleasant months of the year for the 61625 zip code are September, June and May. In the 61625 zip code, there are 4 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for the 61625 zip code with an average high temperature of 85.6°, which ranks it as about average compared to other places in Illinois. December is the snowiest month in the 61625 zip code with 6.9 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.