Weather December 2024 Chicago Il. Chicago records a slight downturn in temperature to. 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.

This post is an overview of the december weather in chicago, including temperature, snow and rain forecasts, as well as tips on how to dress. Average air temperature in chicago is 4.5°c (40.1°f) in december.