National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

University of Illinois - Willard (KCMI)

Lat: 40.03°NLon: 88.28°WElev: 741ft.

Fair

24°F

-4°C

Humidity 84%
Wind Speed S 12 mph
Barometer 30.42 in (1031.1 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Wind Chill13°F (-11°C)
Last update 11 Jan 9:53 pm CST
Extended Forecast for

Monticello IL

  • Tonight

    Tonight: Mostly clear, with a low around 23. Southwest wind 9 to 13 mph, with gusts as high as 23 mph.

    Low: 23 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 43. Southwest wind 9 to 14 mph, with gusts as high as 23 mph.

    High: 43 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 32. Southwest wind 9 to 13 mph, with gusts as high as 18 mph.

    Low: 32 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 52. Southwest wind 14 to 18 mph, with gusts as high as 28 mph.

    High: 52 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 33. West wind 11 to 14 mph, with gusts as high as 20 mph.

    Low: 33 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of snow after noon. Mostly cloudy, with a high near 40. Breezy, with a northwest wind 15 to 25 mph, with gusts as high as 39 mph.

    High: 40 °F

    Breezy.
    Mostly Cloudy
    then Chance
    Snow

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 14. Blustery, with a north northwest wind 18 to 21 mph, with gusts as high as 32 mph.

    Low: 14 °F

    Mostly Cloudy
    and Blustery
    then Partly
    Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 28.

    High: 28 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 22.

    Low: 22 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 23. Southwest wind 9 to 13 mph, with gusts as high as 23 mph.
Monday
Mostly sunny, with a high near 43. Southwest wind 9 to 14 mph, with gusts as high as 23 mph.
Monday Night
Partly cloudy, with a low around 32. Southwest wind 9 to 13 mph, with gusts as high as 18 mph.
Tuesday
Partly sunny, with a high near 52. Southwest wind 14 to 18 mph, with gusts as high as 28 mph.
Tuesday Night
Mostly cloudy, with a low around 33. West wind 11 to 14 mph, with gusts as high as 20 mph.
Wednesday
A 40 percent chance of snow after noon. Mostly cloudy, with a high near 40. Breezy, with a northwest wind 15 to 25 mph, with gusts as high as 39 mph.
Wednesday Night
Mostly cloudy, with a low around 14. Blustery, with a north northwest wind 18 to 21 mph, with gusts as high as 32 mph.
Thursday
Mostly sunny, with a high near 28.
Thursday Night
Mostly cloudy, with a low around 22.
Friday
A 30 percent chance of snow after noon. Mostly cloudy, with a high near 37.
Friday Night
Mostly cloudy, with a low around 20.
Saturday
Mostly cloudy, with a high near 27.
Saturday Night
Mostly cloudy, with a low around 10.
Sunday
Mostly sunny, with a high near 25.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Monticello IL
 40.03°N 88.58°W (Elev. 650 ft)
Last Update:
8:33 pm CST Jan 11, 2026
Forecast Valid:
10pm CST Jan 11, 2026-6pm CST Jan 18, 2026
 
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