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.

Overcast

42°F

6°C

Humidity 85%
Wind Speed NA
Barometer 30.03 in (1017.1 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 7 Mar 11:53 pm CDT
Extended Forecast for

Charleston IL

  • Tonight

    Tonight: Cloudy, then gradually becoming partly cloudy, with a low around 37. West northwest wind around 6 mph.

    Low: 37 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 61. Southwest wind 6 to 14 mph, with gusts as high as 22 mph.

    High: 61 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 43. South southwest wind 8 to 10 mph, with gusts as high as 21 mph.

    Low: 43 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 72. South southwest wind 10 to 16 mph, with gusts as high as 26 mph.

    High: 72 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 58. South southwest wind 10 to 13 mph, with gusts as high as 23 mph.

    Low: 58 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 76. South southwest wind 10 to 18 mph, with gusts as high as 30 mph.

    High: 76 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 57. Breezy, with a south southwest wind 17 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 57 °F

    Showers and
    Breezy

  • Wednesday

    Wednesday: Showers. High near 66. Breezy. Chance of precipitation is 100%.

    High: 66 °F

    Showers and
    Breezy

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain before midnight. Partly cloudy, with a low around 30.

    Low: 30 °F

    Chance Rain
    then Partly
    Cloudy

Detailed Forecast

Tonight
Cloudy, then gradually becoming partly cloudy, with a low around 37. West northwest wind around 6 mph.
Sunday
Sunny, with a high near 61. Southwest wind 6 to 14 mph, with gusts as high as 22 mph.
Sunday Night
Clear, with a low around 43. South southwest wind 8 to 10 mph, with gusts as high as 21 mph.
Monday
Sunny, with a high near 72. South southwest wind 10 to 16 mph, with gusts as high as 26 mph.
Monday Night
Mostly clear, with a low around 58. South southwest wind 10 to 13 mph, with gusts as high as 23 mph.
Tuesday
A 40 percent chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 76. South southwest wind 10 to 18 mph, with gusts as high as 30 mph.
Tuesday Night
Showers and possibly a thunderstorm. Low around 57. Breezy, with a south southwest wind 17 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday
Showers. High near 66. Breezy. Chance of precipitation is 100%.
Wednesday Night
A 30 percent chance of rain before midnight. Partly cloudy, with a low around 30.
Thursday
Sunny, with a high near 47.
Thursday Night
Mostly cloudy, with a low around 38.
Friday
Mostly cloudy, with a high near 61. Breezy.
Friday Night
Mostly cloudy, with a low around 35.
Saturday
Mostly cloudy, with a high near 51.
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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:
10:46 pm CST Mar 7, 2026
Forecast Valid:
11pm CST Mar 7, 2026-6pm CDT Mar 14, 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