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

81°F

27°C

Humidity 77%
Wind Speed S 7 mph
Barometer 29.97 in (1014.0 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 9 Aug 8:53 pm CDT
Extended Forecast for

Mattoon IL

  • Tonight

    Tonight: Partly cloudy, with a low around 73. South wind around 10 mph, with gusts as high as 17 mph.

    Low: 73 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 90. Heat index values as high as 102. South southwest wind around 10 mph, with gusts as high as 17 mph.

    High: 90 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 74. South wind 5 to 10 mph, with gusts as high as 16 mph.

    Low: 74 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers between 7am and 1pm. Mostly sunny, with a high near 90. Heat index values as high as 102. South southwest wind 8 to 10 mph becoming southeast in the morning. Winds could gust as high as 17 mph. Chance of precipitation is 30%.

    High: 90 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Partly cloudy, with a low around 73. Southwest wind 6 to 8 mph, with gusts as high as 15 mph. Chance of precipitation is 40%.

    Low: 73 °F

    Partly Cloudy
    then Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 88. West southwest wind 8 to 10 mph, with gusts as high as 17 mph. Chance of precipitation is 30%.

    High: 88 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 70. West wind around 5 mph becoming light and variable. Chance of precipitation is 50%.

    Low: 70 °F

    Chance
    T-storms

  • Thursday

    Thursday: A 50 percent chance of showers. Partly sunny, with a high near 83.

    High: 83 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely after 1am. Mostly cloudy, with a low around 66. Chance of precipitation is 70%.

    Low: 66 °F

    Chance
    T-storms then
    Showers
    Likely

Detailed Forecast

Tonight
Partly cloudy, with a low around 73. South wind around 10 mph, with gusts as high as 17 mph.
Monday
Mostly sunny, with a high near 90. Heat index values as high as 102. South southwest wind around 10 mph, with gusts as high as 17 mph.
Monday Night
A 20 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 74. South wind 5 to 10 mph, with gusts as high as 16 mph.
Tuesday
A chance of showers between 7am and 1pm. Mostly sunny, with a high near 90. Heat index values as high as 102. South southwest wind 8 to 10 mph becoming southeast in the morning. Winds could gust as high as 17 mph. Chance of precipitation is 30%.
Tuesday Night
A chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Partly cloudy, with a low around 73. Southwest wind 6 to 8 mph, with gusts as high as 15 mph. Chance of precipitation is 40%.
Wednesday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 88. West southwest wind 8 to 10 mph, with gusts as high as 17 mph. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 70. West wind around 5 mph becoming light and variable. Chance of precipitation is 50%.
Thursday
A 50 percent chance of showers. Partly sunny, with a high near 83.
Thursday Night
A chance of showers and thunderstorms, then showers likely after 1am. Mostly cloudy, with a low around 66. Chance of precipitation is 70%.
Friday
A 50 percent chance of showers before 1pm. Mostly cloudy, with a high near 80.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Saturday
A chance of showers. Partly sunny, with a high near 82.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 67.
Sunday
Mostly sunny, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mattoon IL
 39.47°N 88.36°W (Elev. 728 ft)
Last Update:
8:47 pm CDT Aug 9, 2026
Forecast Valid:
9pm CDT Aug 9, 2026-6pm CDT Aug 16, 2026
 
Forecast Discussion
 
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Additional Resources

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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