Chicago weather by month › December
Chicago in December: weather and what to expect
Cold. Highs average 37°F (3°C), so it suits a winter trip. For milder weather, go in September.
December weather in Chicago
Daytime high37°F 3°C
Night low23°F -5°C
Rain2.3 in 58 mm
AirDry
SunWeak sun
In December, Chicago averages highs of 37°F (3°C) and lows of 23°F (-5°C), with 2.3 in (58 mm) of rain. The air feels dry and the sun is weak. 1991–2020 averages, not a forecast.
Pack: a warm jacket.
Places with the same weather in December
Match out of 100 for December, one city per country.
Jan · Feb · Mar · Apr · May · Jun · Jul · Aug · Sep · Oct · Nov · Dec