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United States weather

Weather in Chicago, Illinois for December 2025

Your guide to Chicago weather in December - trends and predictions

    Snow Forecast ❄️

  • Chicago typically experiences moderate snowfall in December, with an average of 6 snowy days.
    According to Chicago snow forecast for December 2025, 7 snowy days are expected until the end of the month. The closest date with snow is Thursday, December 18.

    • Temperatures

  • Until now, December 2025 in Chicago has been significantly cooler than historical averages by -5.1 °F, with average temperature of -1.1 °F.

  • The forecast for the next days in Chicago predicts a temperature of 0 °F, which is cooler than the historical average.

  • In general, the average temperature in Chicago at the beginning of December is 3.9 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 0 °F by the end of December.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
11
Dry days
Average rainy days
14
Rainy days
Average snowy days
6
Snow days
Average temperatures
4°/0°
Temperatures
Average wind speed
24 km/h
Avg max wind
Average humidity
73 %
Avg humidity

Chicago Weather December

Move between months or click on a day
November
January
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Overcast
4°
2
Patchy rain possible
5°
3
Partly cloudy
5°
4
Overcast
2°
5
Overcast
3°
6
Overcast
3°
7
Overcast
5°
8
Overcast
4°
9
Overcast
6°
10
Overcast
6°
11
Overcast
4°
12
Partly cloudy
3°
13
Cloudy
3°
14
Partly cloudy
4°
15
Patchy rain possible
7°
16
Overcast
4°
17
Overcast
-1°
18
Moderate rain
9°
19
Overcast
-6°
20
Moderate or heavy snow showers
3°
21
Light freezing rain
-3°
22
Sunny
1°
23
Partly cloudy
5°
24
Sunny
1°
25
Light freezing rain
-1°
26
Blowing snow
-2°
27
Partly cloudy
-8°
28
Light freezing rain
-2°
29
Overcast
5°
30
Overcast
5°
31
Overcast
3°

Temperatures trend during December in Chicago

See the weather trend as well as the moving average line

December weather in Chicago day by day

Click on a date for more information
November January
Date Weather Temperatures Rain Snow More
Dec. 1 Overcast
Overcast
 4° /-2° 5.3 mm 1.6 cm
Dec. 2 Patchy rain possible
Patchy rain possible
 5° /0° 1 mm 0.2 cm
Dec. 3 Partly cloudy
Partly cloudy
 5° /-1° 4.8 mm 0.8 cm
Dec. 4 Overcast
Overcast
 2° /-3° 0 mm 0 cm
Dec. 5 Overcast
Overcast
 3° /-4° 3.7 mm 0.3 cm
Dec. 6 Overcast
Overcast
 3° /-3° 0 mm 0 cm
Dec. 7 Overcast
Overcast
 5° /-1° 1.4 mm 1 cm
Dec. 8 Overcast
Overcast
 4° /0° 0.1 mm 0 cm
Dec. 9 Overcast
Overcast
 6° /1° 3 mm 0 cm
Dec. 10 Overcast
Overcast
 6° /1° 4.2 mm 0 cm
Dec. 11 Overcast
Overcast
 4° /-1° 2.5 mm 0 cm
Dec. 12 Partly cloudy
Partly cloudy
 3° /-2° 8 mm 0.7 cm
Dec. 13 Cloudy
Cloudy
 3° /-3° 1.5 mm 1 cm
Dec. 14 Partly cloudy
Partly cloudy
 4° /-2° 5.7 mm 0 cm
Dec. 15 Patchy rain possible
Patchy rain possible
 7° /2° 5.3 mm 0 cm
Dec. 16 Overcast
Overcast
 4° /-8° 0 mm 0 cm
Dec. 17 Overcast
Overcast
 -1° /-2° 0 mm 0 cm
Dec. 18 Moderate rain
Moderate rain
 9° /-5° 12.6 mm 0.8 cm
Dec. 19 Overcast
Overcast
 -6° /-10° 0 mm 0 cm
Dec. 20 Moderate or heavy snow showers
Moderate or heavy snow showers
 3° /-3° 1.6 mm 1.2 cm
Dec. 21 Light freezing rain
Light freezing rain
 -3° /-8° 0.2 mm 0.1 cm
Dec. 22 Sunny
Sunny
 1° /-8° 0 mm 0 cm
Dec. 23 Partly cloudy
Partly cloudy
 5° /2° 0 mm 0 cm
Dec. 24 Sunny
Sunny
 1° /-4° 0 mm 0 cm
Dec. 25 Light freezing rain
Light freezing rain
 -1° /-6° 0.2 mm 0.1 cm
Dec. 26 Blowing snow
Blowing snow
 -2° /-9° 0.5 mm 0.3 cm
Dec. 27 Partly cloudy
Partly cloudy
 -8° /-11° 0 mm 0 cm
Dec. 28 Light freezing rain
Light freezing rain
 -2° /-8° 0.2 mm 0.1 cm
Dec. 29 Overcast
Overcast
 5° /1° 2.6 mm 1.2 cm
Dec. 30 Overcast
Overcast
 5° /0° 2.8 mm 1.2 cm
Dec. 31 Overcast
Overcast
 3° /-2° 9.9 mm 3.9 cm
Next
Important Notice
Our weather forecast for Chicago in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Chicago forecast closer to your planned date for the most up-to-date weather information.
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Chicago in December - FAQ

What are the expected maximum and minimum temperatures in Chicago during December?
Brace for cold days with temperatures not exceeding 4° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.
How much rainfall should be expected in Chicago during December?
Moderate rainfall is anticipated in Chicago during December, with a total of 80.2 mm spread over approximately 14 days. Considering plans for rainy days is advisable.
Will it snow in Chicago in December 2025?
Chicago experiences an average snowfall of 7.601 cm during December, occurring over 6 days.
What are the typical wind conditions in Chicago during December?
The average wind speed in Chicago during December is 24 km/h, suggesting breezy to windy conditions, depending on your activities.

Chicago snow forecast December 2025

Track daily snowfall levels and discover Chicago’s snowy potential this December ❄️
On average, Chicago sees 6 snowy days during December, with approximately 7.6 cm of total snowfall.

December rainfall patterns in Chicago

Explore the daily rainfall trends and prepare for Chicagos December weather 💧
Typically, Chicago has 14 rainy days in December with a total of 80.2 mm of rainfall.

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Get accurate weather forecasts for Chicago, located at latitude 41.85 and longitude -87.65. Stay updated with localized weather information tailored for Chicago.

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