Illinois (Chicago)
January
Weather in Illinois for January 2025
Your guide to Illinois weather in January - trends and predictions
In general, the average temperature in Illinois at the beginning of January is 4 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 1 °F by the end of January.
Illinois sees moderate rainfall in January, averaging 10 rainy days.
Snowfall in Illinois during January is quite rare, with fewer than 2 snowy days on average.
- New! Chat with our AI weatherman - it’s amazing and free.
20
Dry days
10
Rainy days
1
Snow days
4°/-7°
Temperatures
22 km/h
Avg max wind
82 %
Avg humidity
Illinois in January average weather
Move between months or click on a day
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  5° | 2 5° | 3  7° | 4 5° | 5  2° | ||
| 6 1° | 7  3° | 8 2° | 9  4° | 10 4° | 11 4° | 12 3° |
| 13 1° | 14 -5° | 15 -4° | 16  -3° | 17  0° | 18 -1° | 19 -2° |
| 20 -3° | 21 -2° | 22 1° | 23 2° | 24 2° | 25  2° | 26 1° |
| 27 2° | 28 1° | 29 3° | 30 -2° | 31 -0° |
You can click on date
Access Illinois weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during January in Illinois
See the weather trend as well as the moving average line
January weather day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Jan. 1 | Overcast | 5° /1° | 3.4 mm | 0.5 cm | |
| Jan. 2 | Overcast | 5° /1° | 0.1 mm | 0 cm | |
| Jan. 3 | Moderate or heavy rain shower | 7° /3° | 8.3 mm | 0.3 cm | |
| Jan. 4 | Overcast | 5° /1° | 0.1 mm | 0 cm | |
| Jan. 5 | Light freezing rain | 2° /0° | 0.7 mm | 0 cm | |
| Jan. 6 | Overcast | 1° /0° | 1.7 mm | 1.4 cm | |
| Jan. 7 | Partly cloudy | 3° /0° | 0.2 mm | 0.1 cm | |
| Jan. 8 | Overcast | 2° /0° | 0.4 mm | 0.3 cm | |
| Jan. 9 | Sunny | 4° /-1° | 10 mm | 4 cm | |
| Jan. 10 | Overcast | 4° /0° | 0.5 mm | 0.1 cm | |
| Jan. 11 | Overcast | 4° /0° | 0.8 mm | 0.7 cm | |
| Jan. 12 | Overcast | 3° /0° | 14 mm | 5.2 cm | |
| Jan. 13 | Overcast | 1° /-7° | 2.9 mm | 0 cm | |
| Jan. 14 | Sunny | -5° /-10° | 0.2 mm | 0 cm | |
| Jan. 15 | Partly cloudy | -4° /-11° | 0 mm | 0 cm | |
| Jan. 16 | Heavy rain at times | -3° /-9° | 3.3 mm | 0 cm | |
| Jan. 17 | Patchy rain possible | 0° /-6° | 0.2 mm | 0 cm | |
| Jan. 18 | Patchy rain possible | -1° /-4° | 2.8 mm | 0.4 cm | |
| Jan. 19 | Moderate rain at times | -2° /-6° | 5.3 mm | 1 cm | |
| Jan. 20 | Overcast | -3° /-8° | 0.1 mm | 0.1 cm | |
| Jan. 21 | Partly cloudy | -2° /-9° | 0.1 mm | 0 cm | |
| Jan. 22 | Light freezing rain | 1° /-3° | 3 mm | 0.2 cm | |
| Jan. 23 | Overcast | 2° /-1° | 7.2 mm | 0 cm | |
| Jan. 24 | Overcast | 2° /0° | 4 mm | 0 cm | |
| Jan. 25 | Patchy moderate snow | 2° /0° | 9 mm | 0.3 cm | |
| Jan. 26 | Light freezing rain | 1° /-2° | 3.7 mm | 0 cm | |
| Jan. 27 | Light freezing rain | 2° /-2° | 0.9 mm | 0 cm | |
| Jan. 28 | Patchy moderate snow | 1° /-2° | 3.2 mm | 0.9 cm | |
| Jan. 29 | Overcast | 3° /-4° | 0.9 mm | 0.3 cm | |
| Jan. 30 | Overcast | -2° /-6° | 1.2 mm | 0.1 cm | |
| Jan. 31 | Overcast | 0° /-7° | 0 mm | 0 cm | |
| Next | |||||
Important Notice
Our weather forecast for Illinois in January 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 Illinois forecast closer to your planned date for the most up-to-date weather information.
Illinois in January - FAQ
What are the expected maximum and minimum temperatures in Illinois during January?
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 Illinois during January?
Significant rainfall exceeding 176.1 mm is expected in Illinois during January, occurring over more than 10 days. Preparing for wet conditions is recommended in your planning.
Is snowfall common in Illinois during January?
Illinois experiences an average snowfall of 31.6 cm during January, occurring over 1 days, which may interest winter sports enthusiasts.
What are the typical wind conditions in Illinois during January?
The average wind speed in Illinois during January is 22 km/h, suggesting breezy to windy conditions, depending on your activities.
January rainfall patterns in Illinois
Explore the daily rainfall trends and prepare for Illinoiss January weather 💧
January snowfall in Illinois
Track daily snowfall levels and discover Illinois’s snowy potential this January ❄️
Provinces in Illinois
Select a province for an accurate weather forecast
Top locations in Illinois
Select a location for an accurate weather forecast
More Locations Quick links
You are here
Where is Illinois?Get accurate weather forecasts for Illinois, located at latitude 41.85 and longitude -87.65. Stay updated with localized weather information tailored for Illinois.
Found a mistake?
We appreciate your attention to details. Tell us here.