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

University of Illinois - Willard (KCMI)

Lat: 40.03°NLon: 88.28°WElev: 741ft.

Fair

59°F

15°C

Humidity 75%
Wind Speed E 7 mph
Barometer 30.15 in (1020.7 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 10 Oct 8:53 am CDT
Extended Forecast for

Monticello IL

  • Today

    Today: Mostly cloudy, with a high near 80. Southeast wind 9 to 11 mph, with gusts as high as 15 mph.

    High: 80 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 57. East southeast wind 5 to 9 mph.

    Low: 57 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 81. Light and variable wind becoming north northeast around 5 mph in the afternoon.

    High: 81 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 59. Calm wind becoming south southwest 5 to 7 mph after midnight.

    Low: 59 °F

    Mostly Clear

  • Columbus Day

    Columbus Day: Sunny, with a high near 88. Southwest wind 7 to 15 mph, with gusts as high as 21 mph.

    High: 88 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 68. South southwest wind around 11 mph, with gusts as high as 17 mph.

    Low: 68 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 84. West southwest wind 11 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 18 mph.

    High: 84 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers after 1am. Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear
    then Chance
    Showers

  • Wednesday

    Wednesday: Showers likely, mainly before 1pm. Mostly sunny, with a high near 75. Chance of precipitation is 60%.

    High: 75 °F

    Showers
    Likely

Detailed Forecast

Today
Mostly cloudy, with a high near 80. Southeast wind 9 to 11 mph, with gusts as high as 15 mph.
Tonight
Mostly cloudy, with a low around 57. East southeast wind 5 to 9 mph.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 81. Light and variable wind becoming north northeast around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 59. Calm wind becoming south southwest 5 to 7 mph after midnight.
Columbus Day
Sunny, with a high near 88. Southwest wind 7 to 15 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 68. South southwest wind around 11 mph, with gusts as high as 17 mph.
Tuesday
Sunny, with a high near 84. West southwest wind 11 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 18 mph.
Tuesday Night
A 30 percent chance of showers after 1am. Mostly clear, with a low around 57.
Wednesday
Showers likely, mainly before 1pm. Mostly sunny, with a high near 75. Chance of precipitation is 60%.
Wednesday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 55.
Thursday
Showers likely. Partly sunny, with a high near 74.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 51.
Friday
Mostly sunny, with a high near 67. Breezy.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Monticello IL
 40.03°N 88.58°W (Elev. 650 ft)
Last Update:
7:35 am CDT Oct 10, 2026
Forecast Valid:
9am CDT Oct 10, 2026-6pm CDT Oct 16, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation