Weather In Chicago December 2024. The average snowfall is 38.4 inches, but chicago only had around 20 inches the past two years. Explore comprehensive december 2024 weather forecasts for chicago, including daily high and low temperatures, precipitation risks, and monthly temperature trends.

Daily high temperatures decrease by 8°f, from 42°f to 34°f, rarely falling below 20°f or exceeding 55°f. Expect 2°c daytime maximum temperatures in the shade with on average 3 hours of sunshine per day in chicago in december.