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

78°F

26°C

Humidity 85%
Wind Speed S 7 mph
Barometer 30.06 in (1017.1 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 14 Aug 1:53 pm CDT
Extended Forecast for

Windsor IL

Heat Advisory August 14, 02:10pm until August 16, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 14, 02:10pm until August 16, 08:00pm

    NOW until 8:00pm Sun

    Heat Advisory

  • This Afternoon

    High: 85 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Partly cloudy, with a low around 72. East wind 5 to 7 mph, with gusts as high as 15 mph.

    Low: 72 °F

    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms before noon. Partly sunny, with a high near 93. Heat index values as high as 106. South wind 6 to 8 mph.

    High: 93 °F

    Slight Chance
    T-storms then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 73. Southwest wind 5 to 7 mph.

    Low: 73 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 91. West northwest wind 7 to 9 mph, with gusts as high as 15 mph.

    High: 91 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 40 percent chance of showers after 1am. Partly cloudy, with a low around 68. North northwest wind 3 to 6 mph.

    Low: 68 °F

    Partly Cloudy
    then Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 84. North wind 5 to 7 mph.

    High: 84 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms before 3pm. Mostly cloudy, with a high near 85. South wind 5 to 7 mph.
Tonight
Partly cloudy, with a low around 72. East wind 5 to 7 mph, with gusts as high as 15 mph.
Saturday
A 20 percent chance of showers and thunderstorms before noon. Partly sunny, with a high near 93. Heat index values as high as 106. South wind 6 to 8 mph.
Saturday Night
Partly cloudy, with a low around 73. Southwest wind 5 to 7 mph.
Sunday
Mostly sunny, with a high near 91. West northwest wind 7 to 9 mph, with gusts as high as 15 mph.
Sunday Night
A 40 percent chance of showers after 1am. Partly cloudy, with a low around 68. North northwest wind 3 to 6 mph.
Monday
Mostly sunny, with a high near 84. North wind 5 to 7 mph.
Monday Night
Partly cloudy, with a low around 63.
Tuesday
Sunny, with a high near 85.
Tuesday Night
Mostly clear, with a low around 67.
Wednesday
Mostly sunny, with a high near 88.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 66.
Thursday
Mostly sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Windsor IL
 39.43°N 88.59°W (Elev. 715 ft)
Last Update:
1:41 pm CDT Aug 14, 2026
Forecast Valid:
2pm CDT Aug 14, 2026-6pm CDT Aug 20, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation