Cook County (Chicago)
December
Weather in Cook County for December 2025
Your guide to Cook County weather in December - trends and predictions
With an average of 5 snowy days, Cook County usually enjoys a light touch of snow in December.
In general, the average temperature in Cook County at the beginning of December is 5 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 4 °F by the end of December.
New! Chat with our AI weatherman - it’s amazing and free.
Snow Forecast ❄️
Temperatures
More
11
Dry days
15
Rainy days
5
Snow days
4°/-1°
Temperatures
24 km/h
Avg max wind
71 %
Avg humidity
Cook County in December average weather
Move between months or click on a day
| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  5° | 2  6° | 3  6° | 4 4° | 5  4° | 6 4° | |
| 7 6° | 8 5° | 9 7° | 10  7° | 11 5° | 12 3° | 13  4° |
| 14 6° | 15 7° | 16 6° | 17 3° | 18 2° | 19 1° | 20 3° |
| 21 3° | 22 3° | 23 2° | 24 2° | 25 2° | 26 3° | 27 5° |
| 28 5° | 29 5° | 30 5° | 31 3° |
You can click on date
Access Cook County weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during December in Cook County
See the weather trend as well as the moving average line
December weather day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Dec. 1 | Overcast | 5° /-2° | 3.8 mm | 0 cm | |
| Dec. 2 | Patchy rain possible | 6° /1° | 1 mm | 0 cm | |
| Dec. 3 | Partly cloudy | 6° /0° | 4.2 mm | 0 cm | |
| Dec. 4 | Overcast | 4° /-1° | 0 mm | 0 cm | |
| Dec. 5 | Moderate or heavy rain shower | 4° /-2° | 4.6 mm | 0.4 cm | |
| Dec. 6 | Overcast | 4° /-3° | 0 mm | 0 cm | |
| Dec. 7 | Overcast | 6° /-1° | 0 mm | 0 cm | |
| Dec. 8 | Overcast | 5° /1° | 0.1 mm | 0 cm | |
| Dec. 9 | Patchy rain possible | 7° /2° | 3.7 mm | 0 cm | |
| Dec. 10 | Sunny | 7° /1° | 3.4 mm | 0 cm | |
| Dec. 11 | Moderate rain at times | 5° /0° | 3 mm | 0 cm | |
| Dec. 12 | Partly cloudy | 3° /-2° | 8.4 mm | 0 cm | |
| Dec. 13 | Cloudy | 4° /-1° | 0.1 mm | 0 cm | |
| Dec. 14 | Overcast | 6° /0° | 6.9 mm | 0 cm | |
| Dec. 15 | Patchy rain possible | 7° /2° | 5.3 mm | 0 cm | |
| Dec. 16 | Overcast | 6° /1° | 2.7 mm | 0 cm | |
| Dec. 17 | Overcast | 3° /0° | 0.3 mm | 0 cm | |
| Dec. 18 | Overcast | 2° /-2° | 2.1 mm | 0.4 cm | |
| Dec. 19 | Overcast | 1° /-3° | 0 mm | 0 cm | |
| Dec. 20 | Overcast | 3° /-1° | 0 mm | 0 cm | |
| Dec. 21 | Patchy rain possible | 3° /-1° | 0.3 mm | 0 cm | |
| Dec. 22 | Overcast | 3° /-3° | 3.6 mm | 0.6 cm | |
| Dec. 23 | Overcast | 2° /-3° | 1.4 mm | 0 cm | |
| Dec. 24 | Overcast | 2° /-4° | 0.2 mm | 0 cm | |
| Dec. 25 | Cloudy | 2° /-3° | 2.1 mm | 0 cm | |
| Dec. 26 | Sunny | 3° /-3° | 0.6 mm | 0 cm | |
| Dec. 27 | Overcast | 5° /0° | 4.3 mm | 0 cm | |
| Dec. 28 | Overcast | 5° /1° | 2.8 mm | 0 cm | |
| Dec. 29 | Overcast | 5° /1° | 2.6 mm | 1.2 cm | |
| Dec. 30 | Overcast | 5° /0° | 2.8 mm | 1.2 cm | |
| Dec. 31 | Overcast | 3° /-2° | 9.9 mm | 3.9 cm | |
| Next | |||||
Important Notice
Our weather forecast for Cook County 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 Cook County forecast closer to your planned date for the most up-to-date weather information.
Cook County in December - FAQ
What are the expected maximum and minimum temperatures in Cook County 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 Cook County during December?
Moderate rainfall is anticipated in Cook County during December, with a total of 72 mm spread over approximately 15 days. Considering plans for rainy days is advisable.
Will it snow in Cook County in December 2025?
Cook County experiences an average snowfall of 4.222 cm during December, occurring over 5 days.
What are the typical wind conditions in Cook County during December?
The average wind speed in Cook County during December is 24 km/h, suggesting breezy to windy conditions, depending on your activities.
Cook County snow forecast December 2025
Track daily snowfall levels and discover Cook County’s snowy potential this December ❄️
December rainfall patterns in Cook County
Explore the daily rainfall trends and prepare for Cook Countys December weather 💧
Top locations in Cook County
Select a location for an accurate weather forecast
More Locations Quick links
You are here
Where is Cook County?Get accurate weather forecasts for Cook County, located at latitude 41.85 and longitude -87.65. Stay updated with localized weather information tailored for Cook County.
Found a mistake?
We appreciate your attention to details. Tell us here.