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

83°F

28°C

Humidity 67%
Wind Speed S 6 mph
Barometer 30.01 in (1015.5 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 1 Sep 9:53 pm CDT
Extended Forecast for

3 Miles NNE Shelbyville IL

Heat Advisory September 1, 10:52pm until September 3, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 1, 10:52pm until September 3, 07:00pm

    NOW until 7:00pm Thu

    Heat Advisory

  • Tonight

    Low: 74 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 99. Heat index values as high as 104. Southwest wind 5 to 8 mph.

    High: 99 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 77. South southwest wind 3 to 5 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 5 to 7 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: Sunny and hot, with a high near 96.

    High: 96 °F

    Hot

Detailed Forecast

Tonight
Clear, with a low around 74. South southwest wind 3 to 5 mph.
Wednesday
Sunny and hot, with a high near 99. Heat index values as high as 104. Southwest wind 5 to 8 mph.
Wednesday Night
Mostly clear, with a low around 77. South southwest wind 3 to 5 mph.
Thursday
Sunny and hot, with a high near 99. Heat index values as high as 104. Southwest wind 5 to 7 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
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 67.
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:
3 Miles NNE Shelbyville IL
 39.44°N 88.76°W (Elev. 574 ft)
Last Update:
10:36 pm CDT Sep 1, 2026
Forecast Valid:
10pm CDT Sep 1, 2026-6pm CDT Sep 8, 2026
 
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Additional Resources

Radar & Satellite Image

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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