Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

Fair

87°F

31°C

Humidity 43%
Wind Speed S 8 mph
Barometer 30.01 in (1015.7 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 30 Aug 4:53 pm CDT
Extended Forecast for

Charleston IL

  • Tonight

    Tonight: Partly cloudy, with a low around 70. South wind 5 to 7 mph.

    Low: 70 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 93. South southwest wind 7 to 10 mph, with gusts as high as 18 mph.

    High: 93 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 74. South wind 5 to 7 mph.

    Low: 74 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 96. Heat index values as high as 101. Southwest wind 6 to 8 mph.

    High: 96 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 76. South southwest wind 3 to 6 mph.

    Low: 76 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 97. South southwest wind 6 to 8 mph.

    High: 97 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 76. South southwest wind 3 to 5 mph.

    Low: 76 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 96.

    High: 96 °F

    Hot

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms after 1am.  Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear
    then Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 70. South wind 5 to 7 mph.
Monday
Sunny, with a high near 93. South southwest wind 7 to 10 mph, with gusts as high as 18 mph.
Monday Night
Mostly clear, with a low around 74. South wind 5 to 7 mph.
Tuesday
Sunny and hot, with a high near 96. Heat index values as high as 101. Southwest wind 6 to 8 mph.
Tuesday Night
Clear, with a low around 76. South southwest wind 3 to 6 mph.
Wednesday
Sunny and hot, with a high near 97. South southwest wind 6 to 8 mph.
Wednesday Night
Mostly clear, with a low around 76. South southwest wind 3 to 5 mph.
Thursday
Sunny and hot, with a high near 96.
Thursday Night
A 30 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 73.
Friday
Sunny, with a high near 93.
Friday Night
Mostly clear, with a low around 70.
Saturday
Sunny, with a high near 89.
Saturday Night
Mostly clear, with a low around 66.
Sunday
Sunny, with a high near 86.
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ABOUT THIS FORECAST

 
Point Forecast:
Charleston IL
 39.48°N 88.19°W (Elev. 650 ft)
4:36 pm CDT Aug 30, 2026
5pm CDT Aug 30, 2026-6pm CDT Sep 6, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database