Weather December 2024 Chicago Weather. Is the climate in chicago (in the united states (usa)) in december good? Get the monthly weather forecast for chicago o'hare international airport, il, including daily high/low, historical averages, to help you plan ahead.

The climate in chicago during december can be summarized as cold and reasonably dry. Daily high temperatures decrease by 8°f, from 42°f to 34°f, rarely falling below 20°f or exceeding 55°f.