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

82°F

28°C

Humidity 65%
Wind Speed S 5 mph
Barometer 30.02 in (1015.5 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 1 Sep 11:53 pm CDT
Extended Forecast for

Ashmore IL

Heat Advisory September 2, 12:33am until September 3, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 2, 12:33am until September 3, 07:00pm

    NOW until 7:00pm Thu

    Heat Advisory

  • Overnight

    Low: 75 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 97. Heat index values as high as 103. South southwest wind 7 to 9 mph, with gusts as high as 16 mph.

    High: 97 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 76. South southwest wind 5 to 7 mph.

    Low: 76 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 97. Heat index values as high as 102. Southwest wind 6 to 8 mph.

    High: 97 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 75. Light south southwest wind.

    Low: 75 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 95. West wind 3 to 6 mph.

    High: 95 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 72. Calm wind.

    Low: 72 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 93.

    High: 93 °F

    Mostly Sunny

Detailed Forecast

Overnight
Mostly clear, with a low around 75. South southwest wind around 6 mph.
Wednesday
Sunny and hot, with a high near 97. Heat index values as high as 103. South southwest wind 7 to 9 mph, with gusts as high as 16 mph.
Wednesday Night
Mostly clear, with a low around 76. South southwest wind 5 to 7 mph.
Thursday
Sunny and hot, with a high near 97. Heat index values as high as 102. Southwest wind 6 to 8 mph.
Thursday Night
Mostly clear, with a low around 75. Light south southwest wind.
Friday
Sunny and hot, with a high near 95. West wind 3 to 6 mph.
Friday Night
Mostly clear, with a low around 72. Calm wind.
Saturday
Mostly sunny, with a high near 93.
Saturday Night
Mostly clear, with a low around 69.
Sunday
Mostly sunny, with a high near 88.
Sunday Night
Partly cloudy, with a low around 65.
Labor Day
Mostly sunny, with a high near 86.
Monday Night
Partly cloudy, with a low around 63.
Tuesday
Mostly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ashmore IL
 39.52°N 88.01°W (Elev. 682 ft)
Last Update:
12:16 am CDT Sep 2, 2026
Forecast Valid:
12am CDT Sep 2, 2026-6pm CDT Sep 8, 2026
 
Forecast Discussion
 
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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