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

79°F

26°C

Humidity 74%
Wind Speed S 5 mph
Barometer 30.02 in (1015.7 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 2 Sep 12:53 am CDT
Extended Forecast for

4 Miles NE Shelbyville IL

Heat Advisory September 2, 01:12am until September 3, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 2, 01:12am until September 3, 07:00pm

    NOW until 7:00pm Thu

    Heat Advisory

  • Overnight

    Low: 74 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 99. Heat index values as high as 104. Southwest wind 6 to 9 mph, with gusts as high as 17 mph.

    High: 99 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 77. South southwest wind 3 to 6 mph.

    Low: 77 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 99. Heat index values as high as 104. Southwest wind 6 to 8 mph.

    High: 99 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 76. Light south southwest wind.

    Low: 76 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 98. West southwest wind 3 to 5 mph.

    High: 98 °F

    Hot

  • Friday Night

    Friday Night: Partly cloudy, with a low around 73. Calm wind.

    Low: 73 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny and hot, with a high near 96.

    High: 96 °F

    Hot

Detailed Forecast

Overnight
Clear, with a low around 74. South southwest wind around 6 mph.
Wednesday
Sunny and hot, with a high near 99. Heat index values as high as 104. Southwest wind 6 to 9 mph, with gusts as high as 17 mph.
Wednesday Night
Mostly clear, with a low around 77. South southwest wind 3 to 6 mph.
Thursday
Sunny and hot, with a high near 99. Heat index values as high as 104. Southwest wind 6 to 8 mph.
Thursday Night
Mostly clear, with a low around 76. Light south southwest wind.
Friday
Sunny and hot, with a high near 98. West southwest wind 3 to 5 mph.
Friday Night
Partly cloudy, with a low around 73. Calm wind.
Saturday
Mostly sunny and hot, with a high near 96.
Saturday Night
Partly cloudy, with a low around 70.
Sunday
Mostly sunny, with a high near 91.
Sunday Night
Partly cloudy, with a low around 66.
Labor Day
Mostly sunny, with a high near 88.
Monday Night
Partly cloudy, with a low around 64.
Tuesday
Mostly sunny, with a high near 88.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NE Shelbyville IL
 39.46°N 88.76°W (Elev. 646 ft)
Last Update:
12:36 am CDT Sep 2, 2026
Forecast Valid:
1am 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