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

23°F

-5°C

Humidity 92%
Wind Speed S 7 mph
Barometer 30.46 in (1032.6 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill15°F (-9°C)
Last update 11 Jan 7:53 pm CST
Extended Forecast for

Monticello IL

  • Tonight

    Tonight: Mostly cloudy during the early evening, then becoming clear, with a low around 25. Southwest wind 8 to 13 mph, with gusts as high as 23 mph.

    Low: 25 °F

    Clear

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 43. West southwest wind 9 to 14 mph, with gusts as high as 23 mph.

    High: 43 °F

    Decreasing
    Clouds

  • 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: Mostly cloudy, with a high near 52. Breezy, with a southwest wind 14 to 20 mph, with gusts as high as 28 mph.

    High: 52 °F

    Mostly Cloudy
    and Breezy

  • 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 21.

    Low: 21 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy during the early evening, then becoming clear, with a low around 25. Southwest wind 8 to 13 mph, with gusts as high as 23 mph.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 43. West 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
Mostly cloudy, with a high near 52. Breezy, with a southwest wind 14 to 20 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 21.
Friday
A 30 percent chance of snow after noon. Mostly cloudy, with a high near 36.
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 24.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Monticello IL
 40.05°N 88.55°W (Elev. 650 ft)
Last Update:
5:47 pm CST Jan 11, 2026
Forecast Valid:
8pm CST Jan 11, 2026-6pm CST Jan 18, 2026
 
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