National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

Fair

47°F

8°C

Humidity 90%
Wind Speed Calm
Barometer 29.91 in (1012.6 mb)
Dewpoint 44°F (7°C)
Visibility 8.00 mi
Last update 21 Mar 4:53 am CDT
Extended Forecast for

Charleston IL

  • Today

    Today: Sunny, with a high near 81. East wind 5 to 8 mph becoming south southwest in the afternoon.

    High: 81 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 59. South southwest wind 7 to 10 mph, with gusts as high as 22 mph.

    Low: 59 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 83. South southwest wind 10 to 18 mph becoming north in the afternoon. Winds could gust as high as 26 mph.

    High: 83 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 33. Breezy, with a north wind 14 to 22 mph, with gusts as high as 34 mph.

    Low: 33 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Clear

  • Monday

    Monday: Mostly sunny, with a high near 52. North northeast wind 9 to 11 mph, with gusts as high as 21 mph.

    High: 52 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 35. East wind around 6 mph.

    Low: 35 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 58. South wind 6 to 8 mph.

    High: 58 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 64.

    High: 64 °F

    Mostly Cloudy

Detailed Forecast

Today
Sunny, with a high near 81. East wind 5 to 8 mph becoming south southwest in the afternoon.
Tonight
Mostly clear, with a low around 59. South southwest wind 7 to 10 mph, with gusts as high as 22 mph.
Sunday
Partly sunny, with a high near 83. South southwest wind 10 to 18 mph becoming north in the afternoon. Winds could gust as high as 26 mph.
Sunday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 33. Breezy, with a north wind 14 to 22 mph, with gusts as high as 34 mph.
Monday
Mostly sunny, with a high near 52. North northeast wind 9 to 11 mph, with gusts as high as 21 mph.
Monday Night
Mostly cloudy, with a low around 35. East wind around 6 mph.
Tuesday
Partly sunny, with a high near 58. South wind 6 to 8 mph.
Tuesday Night
Mostly cloudy, with a low around 41.
Wednesday
Mostly cloudy, with a high near 64.
Wednesday Night
Mostly cloudy, with a low around 51.
Thursday
A chance of rain. Mostly sunny, with a high near 75.
Thursday Night
A chance of rain. Partly cloudy, with a low around 40.
Friday
Partly sunny, with a high near 53.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Charleston IL
 39.5°N 88.19°W (Elev. 650 ft)
Last Update:
4:36 am CDT Mar 21, 2026
Forecast Valid:
5am CDT Mar 21, 2026-6pm CDT Mar 27, 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