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

78°F

26°C

Humidity 48%
Wind Speed NE 7 mph
Barometer 30.10 in (1018.8 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 3 Aug 5:53 pm CDT
Extended Forecast for

Allerton IL

  • Tonight

    Tonight: Increasing clouds, with a low around 60. East northeast wind 3 to 7 mph.

    Low: 60 °F

    Increasing
    Clouds

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms, mainly after 5pm. Partly sunny, with a high near 81. East wind 3 to 8 mph.

    High: 81 °F

    Partly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 7pm, then a slight chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 64. East southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.

    Low: 64 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 82. Calm wind becoming east southeast around 5 mph.

    High: 82 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 86. Calm wind.

    High: 86 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 65. Calm wind.

    Low: 65 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 60. East northeast wind 3 to 7 mph.
Monday
A 30 percent chance of showers and thunderstorms, mainly after 5pm. Partly sunny, with a high near 81. East wind 3 to 8 mph.
Monday Night
A chance of showers and thunderstorms before 7pm, then a slight chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 64. East southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 82. Calm wind becoming east southeast around 5 mph.
Tuesday Night
Mostly clear, with a low around 64. Calm wind.
Wednesday
Mostly sunny, with a high near 86. Calm wind.
Wednesday Night
Mostly clear, with a low around 65. Calm wind.
Thursday
Sunny, with a high near 87.
Thursday Night
Mostly clear, with a low around 66.
Friday
Sunny, with a high near 88.
Friday Night
Mostly clear, with a low around 68.
Saturday
Sunny, with a high near 90.
Saturday Night
Mostly clear, with a low around 70.
Sunday
Mostly sunny, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Allerton IL
 39.91°N 87.93°W (Elev. 666 ft)
Last Update:
6:41 pm CDT Aug 3, 2025
Forecast Valid:
6pm CDT Aug 3, 2025-6pm CDT Aug 10, 2025
 
Forecast Discussion
 
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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