Average temperatures, rainfall and packing tips for Chicago, United States in December
December in Chicago is typically cold, with average daytime highs around 3°C and nights near -3°C. It is one of the cooler months of Chicago's year.
Expect some rain: around 48 mm falls in Chicago during December on average.
If your dates are flexible, the most comfortable months in Chicago are usually May, June, July, August, September and October.
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In December, Chicago averages a daytime high of about 3°C and a night-time low of around -3°C, based on recent historical data.
Expect some rain: around 48 mm falls in Chicago during December on average.
December is cold in Chicago. City sightseeing works fine if you dress for it, but pack properly and expect short days. If your dates are flexible, the most comfortable months in Chicago are usually May, June, July, August, September and October.