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

Hazardous Weather Conditions

Current conditions at

University of Illinois - Willard (KCMI)

Lat: 40.03°NLon: 88.28°WElev: 741ft.

Fair

41°F

5°C

Humidity 76%
Wind Speed S 7 mph
Barometer 30.08 in (1018.9 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 2 May 11:53 pm CDT
Extended Forecast for

Monticello IL

  • Overnight

    Overnight: Mostly clear, with a low around 39. South southwest wind 6 to 9 mph, with gusts as high as 15 mph.

    Low: 39 °F

    Mostly Clear

  • Sunday

    Sunday: A slight chance of showers between 10am and 3pm. Increasing clouds, with a high near 67. Breezy, with a south southwest wind 11 to 16 mph increasing to 18 to 23 mph in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 20%.

    High: 67 °F

    Slight Chance
    Showers and
    Breezy

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Partly cloudy, with a low around 48. Southwest wind 8 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.

    Low: 48 °F

    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 76. Breezy, with a south southwest wind 9 to 14 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 76 °F

    Sunny then
    Mostly Sunny
    and Breezy

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 56. South southwest wind 13 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 56 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm before 10am, then showers likely between 10am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 63. South southwest wind 13 to 16 mph becoming north in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

    High: 63 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 42. North wind 10 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 42 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A 30 percent chance of showers after 1pm. Partly sunny, with a high near 56.

    High: 56 °F

    Partly Sunny
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 41.

    Low: 41 °F

    Chance
    Showers

Detailed Forecast

Overnight
Mostly clear, with a low around 39. South southwest wind 6 to 9 mph, with gusts as high as 15 mph.
Sunday
A slight chance of showers between 10am and 3pm. Increasing clouds, with a high near 67. Breezy, with a south southwest wind 11 to 16 mph increasing to 18 to 23 mph in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 20%.
Sunday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Partly cloudy, with a low around 48. Southwest wind 8 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 76. Breezy, with a south southwest wind 9 to 14 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 30 mph.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 56. South southwest wind 13 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
Showers likely and possibly a thunderstorm before 10am, then showers likely between 10am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 63. South southwest wind 13 to 16 mph becoming north in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Tuesday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 42. North wind 10 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
A 30 percent chance of showers after 1pm. Partly sunny, with a high near 56.
Wednesday Night
A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 41.
Thursday
Partly sunny, with a high near 61.
Thursday Night
Partly cloudy, with a low around 42.
Friday
Mostly sunny, with a high near 67.
Friday Night
Partly cloudy, with a low around 48.
Saturday
Mostly sunny, with a high near 73.
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:
10:36 pm CDT May 2, 2026
Forecast Valid:
12am CDT May 3, 2026-6pm CDT May 9, 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