Chicago Weather in December

December in Chicago brings low temperatures, with daytime highs of 3°C (37°F) and nights around -5°C (23°F). Quite a bit of snow/rainfall is expected, around 81 mm (3.2 in), so pack an umbrella.

Rainfall in Chicago in December

Looking at the last 30 years, the data shows about 13 days with snow/rain, averaging 81 mm (3.2 in) for the month. Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.

Temperature in Chicago in December

If you're visiting Chicago in December, expect highs of 3°C (37°F) and overnight lows around -5°C (23°F). December is part of winter. Staying warm is the main priority this month, especially during mornings and evenings. With overnight lows of -5°C (23°F), temperatures fall below freezing at night. An extra thick blanket can make a real difference if your accommodation runs cold. With the coldest weather of the year, this month demands extra warmth. Be sure to layer up to stay comfortable.

Sunshine in Chicago in December

You can expect a moderate amount of sunlight, with approximately 107 hours. This means a pleasant mix of sun and overcast.

Wind Speed in Chicago in December

December has wind speeds averaging 5 m/s (10 knots). You can expect gentle to moderate winds that move small trees and make flags wave steadily on typical days. Conditions typically range from light breezes to moderate winds.

If you prefer dry days with pleasant temperatures, December may not be the ideal month to visit Chicago. Our weather planner can help you explore destinations with more pleasant weather conditions.