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

66°F

19°C

Humidity 87%
Wind Speed N 5 mph
Barometer 29.91 in (1012.2 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 28 Jul 11:53 pm CDT
Extended Forecast for

Charleston IL

  • Overnight

    Overnight: Partly cloudy, with a low around 61. North wind 3 to 5 mph.

    Low: 61 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 83. North northeast wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 83 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 61. Northeast wind 3 to 6 mph.

    Low: 61 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 85. Light and variable wind.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 64. Calm wind.

    Low: 64 °F

    Partly Cloudy

  • Friday

    Friday: A 40 percent chance of showers after 1pm. Partly sunny, with a high near 82. South southeast wind 3 to 8 mph.

    High: 82 °F

    Partly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. Southeast wind 6 to 8 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 65 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 78. Chance of precipitation is 60%.

    High: 78 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.

    Low: 65 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Partly cloudy, with a low around 61. North wind 3 to 5 mph.
Wednesday
Sunny, with a high near 83. North northeast wind 5 to 10 mph, with gusts as high as 15 mph.
Wednesday Night
Clear, with a low around 61. Northeast wind 3 to 6 mph.
Thursday
Sunny, with a high near 85. Light and variable wind.
Thursday Night
Partly cloudy, with a low around 64. Calm wind.
Friday
A 40 percent chance of showers after 1pm. Partly sunny, with a high near 82. South southeast wind 3 to 8 mph.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. Southeast wind 6 to 8 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 78. Chance of precipitation is 60%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.
Sunday
A 40 percent chance of showers after 1pm. Mostly sunny, with a high near 81.
Sunday Night
Partly cloudy, with a low around 64.
Monday
A chance of showers. Mostly sunny, with a high near 83.
Monday Night
Mostly clear, with a low around 66.
Tuesday
A chance of showers. Sunny, with a high near 85.
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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:
12:36 am CDT Jul 29, 2026
Forecast Valid:
12am CDT Jul 29, 2026-6pm CDT Aug 4, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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