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

22°C

72°F

Humidity 94%
Wind Speed SW 6 km/h
Barometer 1015.2 mb (30.00 in)
Dewpoint 21°C (70°F)
Visibility 16 km
Last update 12 Jul 11:53 pm CDT
Extended Forecast for

Charleston IL

  • Overnight

    Overnight: Partly cloudy, with a low around 21. Calm wind.

    Low: 21 °C

    Partly Cloudy

  • Sunday

    Sunday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 30. Calm wind becoming south southwest 5 to 8 km/h in the morning. Chance of precipitation is 30%.

    High: 30 °C

    Mostly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 20. Calm wind.

    Low: 20 °C

    Slight Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 31. Calm wind.

    High: 31 °C

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 21. Calm wind.

    Low: 21 °C

    Partly Cloudy

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 31. Calm wind becoming south 5 to 10 km/h in the morning.

    High: 31 °C

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 22. Calm wind.

    Low: 22 °C

    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 31. Chance of precipitation is 60%.

    High: 31 °C

    Chance
    T-storms then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 22.

    Low: 22 °C

    Chance
    T-storms

Detailed Forecast

Overnight
Partly cloudy, with a low around 21. Calm wind.
Sunday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 30. Calm wind becoming south southwest 5 to 8 km/h in the morning. Chance of precipitation is 30%.
Sunday Night
A 20 percent chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 20. Calm wind.
Monday
Mostly sunny, with a high near 31. Calm wind.
Monday Night
Partly cloudy, with a low around 21. Calm wind.
Tuesday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 31. Calm wind becoming south 5 to 10 km/h in the morning.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 22. Calm wind.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 31. Chance of precipitation is 60%.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 22.
Thursday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 31.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 20.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 29.
Friday Night
Partly cloudy, with a low around 19.
Saturday
Mostly sunny, with a high near 30.
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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 m)
Last Update:
5:41 pm CDT Jul 12, 2025
Forecast Valid:
12am CDT Jul 13, 2025-6pm CDT Jul 19, 2025
 
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