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

56°F

13°C

Humidity 75%
Wind Speed E 3 mph
Barometer 30.06 in (1017.7 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 27 Sep 2:53 am CDT
Extended Forecast for

Charleston IL

  • Overnight

    Overnight: Mostly clear, with a low around 50. Calm wind.

    Low: 50 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 76. North wind 3 to 7 mph.

    High: 76 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 49. North northeast wind 3 to 6 mph.

    Low: 49 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 77. North northeast wind around 6 mph.

    High: 77 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 51. Calm wind.

    Low: 51 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 79. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 79 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 60. South southeast wind 3 to 6 mph.

    Low: 60 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 81.

    High: 81 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 66.

    Low: 66 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Overnight
Mostly clear, with a low around 50. Calm wind.
Sunday
Mostly sunny, with a high near 76. North wind 3 to 7 mph.
Sunday Night
Mostly clear, with a low around 49. North northeast wind 3 to 6 mph.
Monday
Sunny, with a high near 77. North northeast wind around 6 mph.
Monday Night
Clear, with a low around 51. Calm wind.
Tuesday
Sunny, with a high near 79. Calm wind becoming south southeast around 5 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 60. South southeast wind 3 to 6 mph.
Wednesday
Mostly cloudy, with a high near 81.
Wednesday Night
A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 66.
Thursday
A 50 percent chance of showers. Mostly cloudy, with a high near 79.
Thursday Night
Showers likely. Mostly cloudy, with a low around 62.
Friday
A chance of showers. Mostly cloudy, with a high near 72.
Friday Night
A chance of showers. Mostly cloudy, with a low around 58.
Saturday
A chance of showers. Partly sunny, with a high near 70.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Charleston IL
 39.48°N 88.19°W (Elev. 650 ft)
Last Update:
1:36 am CDT Sep 27, 2026
Forecast Valid:
3am CDT Sep 27, 2026-6pm CDT Oct 3, 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