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

Hazardous Weather Conditions

Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

Fair

76°F

24°C

Humidity 82%
Wind Speed S 6 mph
Barometer 30.04 in (1016.4 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 2 Sep 6:53 am CDT
Extended Forecast for

3 Miles NE Shelbyville IL

Heat Advisory September 2, 07:17am until September 4, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 2, 07:17am until September 4, 07:00pm

    NOW until 7:00pm Fri

    Heat Advisory

  • Today

    High: 98 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 76. South wind 3 to 6 mph.

    Low: 76 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 98. Heat index values as high as 103. West southwest wind 6 to 8 mph.

    High: 98 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 76. South wind 3 to 5 mph.

    Low: 76 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 97. Southwest wind 3 to 5 mph.

    High: 97 °F

    Hot

  • Friday Night

    Friday Night: Partly cloudy, with a low around 74. Calm wind.

    Low: 74 °F

    Partly Cloudy

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms before 1pm. Mostly sunny and hot, with a high near 95. Light and variable wind.

    High: 95 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 71.

    Low: 71 °F

    Partly Cloudy

Detailed Forecast

Today
Sunny and hot, with a high near 98. Heat index values as high as 104. Southwest wind 5 to 9 mph, with gusts as high as 16 mph.
Tonight
Mostly clear, with a low around 76. South wind 3 to 6 mph.
Thursday
Sunny and hot, with a high near 98. Heat index values as high as 103. West southwest wind 6 to 8 mph.
Thursday Night
Mostly clear, with a low around 76. South wind 3 to 5 mph.
Friday
Sunny and hot, with a high near 97. Southwest wind 3 to 5 mph.
Friday Night
Partly cloudy, with a low around 74. Calm wind.
Saturday
A 30 percent chance of showers and thunderstorms before 1pm. Mostly sunny and hot, with a high near 95. Light and variable wind.
Saturday Night
Partly cloudy, with a low around 71.
Sunday
Sunny, with a high near 91.
Sunday Night
Partly cloudy, with a low around 67.
Labor Day
Mostly sunny, with a high near 89.
Monday Night
Partly cloudy, with a low around 66.
Tuesday
Mostly sunny, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NE Shelbyville IL
 39.44°N 88.76°W (Elev. 574 ft)
Last Update:
6:36 am CDT Sep 2, 2026
Forecast Valid:
7am CDT Sep 2, 2026-6pm CDT Sep 8, 2026
 
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