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

62°F

17°C

Humidity 73%
Wind Speed NE 10 mph
Barometer 29.99 in (1015.4 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 22 May 10:53 am CDT
Extended Forecast for

Charleston IL

  • Today

    Today: A 20 percent chance of showers after 4pm. Mostly cloudy, with a high near 67. East wind around 10 mph, with gusts as high as 17 mph.

    High: 67 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: A 40 percent chance of showers, mainly before 3am. Cloudy, with a low around 59. East northeast wind 5 to 8 mph becoming light and variable after midnight. Winds could gust as high as 15 mph.

    Low: 59 °F

    Chance
    Showers

  • Saturday

    Saturday: A 10 percent chance of showers before 7am. Mostly cloudy, with a high near 76. West northwest wind around 6 mph.

    High: 76 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 60. Calm wind.

    Low: 60 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers likely, mainly after 1pm. Cloudy, with a high near 78. Calm wind becoming west northwest around 5 mph in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 78 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 59. Calm wind.

    Low: 59 °F

    Mostly Cloudy

  • Memorial Day

    Memorial Day: Partly sunny, with a high near 79. East wind 3 to 5 mph.

    High: 79 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 62.

    Low: 62 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 81.

    High: 81 °F

    Partly Sunny
    then Chance
    T-storms

Detailed Forecast

Today
A 20 percent chance of showers after 4pm. Mostly cloudy, with a high near 67. East wind around 10 mph, with gusts as high as 17 mph.
Tonight
A 40 percent chance of showers, mainly before 3am. Cloudy, with a low around 59. East northeast wind 5 to 8 mph becoming light and variable after midnight. Winds could gust as high as 15 mph.
Saturday
A 10 percent chance of showers before 7am. Mostly cloudy, with a high near 76. West northwest wind around 6 mph.
Saturday Night
Mostly cloudy, with a low around 60. Calm wind.
Sunday
Showers likely, mainly after 1pm. Cloudy, with a high near 78. Calm wind becoming west northwest around 5 mph in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
Mostly cloudy, with a low around 59. Calm wind.
Memorial Day
Partly sunny, with a high near 79. East wind 3 to 5 mph.
Monday Night
Mostly cloudy, with a low around 62.
Tuesday
A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 81.
Tuesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 65.
Wednesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 82.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 66.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Charleston IL
 39.48°N 88.19°W (Elev. 650 ft)
Last Update:
10:46 am CDT May 22, 2026
Forecast Valid:
11am CDT May 22, 2026-6pm CDT May 28, 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