Weather Forecast Chicago December 2025

Weather Forecast Chicago December 2025. In chicago, december temperatures are typically chilly. Insights into temperature, precipitation, and weather trends.

Weather.com brings you the most accurate monthly weather forecast for chicago, il with average/record and high/low temperatures, precipitation and more. Precipitation and snowfall will be below normal, with the most snow in late december, from late january into early february, and from late february into early march.