National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

Fog/Mist

71°F

22°C

Humidity 96%
Wind Speed SE 6 mph
Barometer 29.89 in (1011.6 mb)
Dewpoint 70°F (21°C)
Visibility 5.00 mi
Last update 13 Aug 5:53 am CDT
Extended Forecast for

Charleston IL

  • Today

    Today: A 30 percent chance of showers and thunderstorms, mainly between 1pm and 4pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 87. East wind 5 to 7 mph.

    High: 87 °F

    Chance
    T-storms and
    Patchy Fog

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 2am. Mostly cloudy, with a low around 71. East southeast wind 6 to 9 mph, with gusts as high as 17 mph.

    Low: 71 °F

    Chance
    T-storms

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms, mainly before 11am. Cloudy, then gradually becoming mostly sunny, with a high near 89. Heat index values as high as 103. East wind 6 to 9 mph becoming south in the afternoon. Winds could gust as high as 16 mph.

    High: 89 °F

    Chance
    Showers then
    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 72. East southeast wind around 6 mph.

    Low: 72 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 91. Southeast wind around 7 mph becoming south southwest in the afternoon.

    High: 91 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 74. South wind 5 to 7 mph.

    Low: 74 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 91. Southwest wind around 8 mph, with gusts as high as 15 mph.

    High: 91 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 70. Chance of precipitation is 40%.

    Low: 70 °F

    Chance
    T-storms

  • Monday

    Monday: Partly sunny, with a high near 84.

    High: 84 °F

    Partly Sunny

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms, mainly between 1pm and 4pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 87. East wind 5 to 7 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly after 2am. Mostly cloudy, with a low around 71. East southeast wind 6 to 9 mph, with gusts as high as 17 mph.
Friday
A 40 percent chance of showers and thunderstorms, mainly before 11am. Cloudy, then gradually becoming mostly sunny, with a high near 89. Heat index values as high as 103. East wind 6 to 9 mph becoming south in the afternoon. Winds could gust as high as 16 mph.
Friday Night
Partly cloudy, with a low around 72. East southeast wind around 6 mph.
Saturday
Mostly sunny, with a high near 91. Southeast wind around 7 mph becoming south southwest in the afternoon.
Saturday Night
Mostly clear, with a low around 74. South wind 5 to 7 mph.
Sunday
Mostly sunny, with a high near 91. Southwest wind around 8 mph, with gusts as high as 15 mph.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 70. Chance of precipitation is 40%.
Monday
Partly sunny, with a high near 84.
Monday Night
Partly cloudy, with a low around 63.
Tuesday
Sunny, with a high near 82.
Tuesday Night
Mostly clear, with a low around 65.
Wednesday
Mostly sunny, with a high near 86.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Charleston IL
 39.5°N 88.19°W (Elev. 650 ft)
Last Update:
5:26 am CDT Aug 13, 2026
Forecast Valid:
6am CDT Aug 13, 2026-6pm CDT Aug 19, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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