Illinois Weather In January 2023

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(CA)Sunnyvale (CA)Syracuse (NY)Tacoma (WA)Tallahassee (FL)Tampa (FL)Tempe (AZ)Toledo (OH)Toms River (NJ)Topeka (KS)Traverse City (MI)Trenton (NJ)Tucson (AZ)Tulsa (OK)Tyler (TX)Upper Marlboro (MD)Utica (NY)Vacaville (CA)Valdosta (GA)Venice (FL)Virginia Beach (VA)Waikiki (HI)Wapato (WA)Washington (PA)Washington DC (FL)Weatherford (TX)West Palm Beach (FL)Wichita (KS)Wilmington (NC)Winchester (VA)Winston-Salem (NC)Woodbridge (NJ)Worcester (MA)York (PA)Yosemite (CA) February Illinois weather in January 2026 Click on a day for an hourly weather forecast Saturday Dec 20 Overcast 0 mm 5° / -7° Sunday Dec 21 Partly cloudy 0 mm -3° / -10° Monday Dec 22 Overcast 0 mm 4° / -7° Tuesday Dec 23 Partly cloudy 0 mm 4° / 1° Wednesday Dec 24 Mist 0.5 mm 4° / 1° Thursday Dec 25 Light drizzle 2 mm 14° / 6° Friday Dec 26 Cloudy 0 mm 9° / 6° Saturday Dec 27 Overcast 0 mm 9° / 5° Sunday Dec 28 Cloudy 0 mm 5° / 4° Monday Dec 29 Light snow 0 mm 3° / 2° Tuesday Dec 30 Cloudy 0 mm 2° / 0° Wednesday Dec 31 Partly cloudy 0 mm 5° / 0° Thursday Jan 1 Sunny 0 mm 8° / 2° Friday Jan 2 Partly cloudy 0 mm 8° / 4° NextMonth >>

The average weather in Illinois in January

The weather in Illinois in January is very cold with temperatures between -7°C and -2°C, warm clothes are a must.

You can expect about 3 to 8 days of rain in Illinois during the month of January. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.

Let it snow! You can expect Illinois to be covered in white during the month of January. Be sure to bundle up when you venture outside, or take the opportunity to enjoy hot cocoa by the fire for warmth this month.

Our weather forecast can give you a great sense of what weather to expect in Illinois in January 2026.

If you’re planning to visit Illinois in the near future, we highly recommend that you review the 14 day weather forecast for Illinois before you arrive.

Temperatures Temperatures -2° / -7° Rainy Days Rainy Days 5 Snowy Days Snowy Days 15 Dry Days Dry Days 11 Rainfall Rainfall 39 mm 6.3 Sun Hours 6.3 Hrs Historic average weather for January January
Sun Mon Tue Wed Thu Fri Sat
1 Sunny 8° /2° 2 Partly cloudy 8° /4° 3 Sunny 3° /-2°
4 Sunny 2° /-3° 5 Cloudy 2° /-2° 6 Overcast 0° /-2° 7 Overcast 1° /-2° 8 Overcast 0° /-4° 9 Partly cloudy 1° /-4° 10 Overcast 1° /-3°
11 Partly cloudy 0° /-5° 12 Heavy snow 1° /-2° 13 Heavy snow 0° /-4° 14 Overcast -1° /-5° 15 Ice pellets -2° /-6° 16 Light snow -2° /-6° 17 Heavy snow -1° /-5°
18 Moderate snow 0° /-5° 19 Blowing snow -5° /-10° 20 Partly cloudy -5° /-10° 21 Partly cloudy -4° /-9° 22 Overcast -2° /-7° 23 Overcast -1° /-6° 24 Overcast 0° /-6°
25 Heavy snow -2° /-6° 26 Mist -3° /-7° 27 Moderate snow -1° /-6° 28 Heavy snow -1° /-6° 29 Overcast -2° /-8° 30 Overcast -6° /-8° 31 Overcast -2° /-7°
Click on a day for an hourly weather forecast

Explore the weather in Illinois in other months

01January02February03March04April05May06June07July08August09September10October11November12December

Illinois annual weather

Month Temperatures Rainy Days Dry Days Snowy Days Rainfall Weather More details
January -2° / -7° 5 11 15 39 mm Awful Illinois in January
February 0° / -6° 4 11 14 41 mm Awful Illinois in February
March 7° / 1° 6 19 6 55 mm Bad Illinois in March
April 12° / 5° 7 21 3 79 mm Awful Illinois in April
May 19° / 12° 7 24 0 98 mm Ok Illinois in May
June 24° / 17° 7 23 0 128 mm Good Illinois in June
July 27° / 20° 7 24 0 114 mm Good Illinois in July
August 27° / 19° 5 26 0 100 mm Perfect Illinois in August
September 24° / 16° 4 26 0 64 mm Perfect Illinois in September
October 16° / 10° 5 25 0 65 mm Good Illinois in October
November 9° / 3° 4 22 4 40 mm Bad Illinois in November
December 3° / -2° 5 16 10 38 mm Awful Illinois in December
Temperatures in Illinois in January Rain in Illinois in January

Recommended Hotels in Illinois

We know that finding the ideal hotel in Illinois can be a hard task...

That’s why we run our special tools and found the best hotels in Illinois. Click on hotel for more details.

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Weather in Illinois in January - FAQ

What is the average temperature in Illinois in January? The average temperature in Illinois in January is -7/-2° C. What is the chance of rain in Illinois in January? On average, there are 5 rainy days in Illinois during January. Weather wise, is January a good time to visit Illinois? The weather in Illinois in January is awful. Can it snow in Illinois in January? On average, there are 15 snowy days in Illinois in January. Cities in Illinois

For a more accurate weather forecast please select a city

Aurora Champaign Chicago Elgin Joliet Naperville Quincy Rockford Springfield Zion See more locations More about the weather in Illinois Illinois 14 day weather Long range weather for Illinois Illinois weather in December Illinois Webcam Weather tomorrow Hotels in Illinois

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