Heat in the Central U.S.; Heavy Rain Possible for South Texas; Monitoring Erin Tropical Impacts

Hot temperatures are forecast over the Plains and into the lower Mississippi River Valley Friday where Heat Advisories have been issued. Heavy rain from a disturbance in the western Gulf could bring flooding to south Texas. Erin could bring tropical storm conditions and heavy rain to Puerto Rico and the USVI this weekend with dangerous surf and rip currents impacting the western Atlantic Basin. Read More >

Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

Fair

78°F

26°C

Humidity 82%
Wind Speed E 3 mph
Barometer 30.01 in (1015.5 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 14 Aug 7:53 pm CDT
Extended Forecast for

Charleston IL

  • Tonight

    Tonight: Mostly clear, with a low around 67. Light east wind.

    Low: 67 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 90. South wind 3 to 5 mph.

    High: 90 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 69. Calm wind.

    Low: 69 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 92. Heat index values as high as 100. Light south southwest wind.

    High: 92 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 72. Calm wind.

    Low: 72 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 94. Calm wind.

    High: 94 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 72. Calm wind.

    Low: 72 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 67. Light east wind.
Friday
Mostly sunny, with a high near 90. South wind 3 to 5 mph.
Friday Night
Mostly clear, with a low around 69. Calm wind.
Saturday
Sunny, with a high near 92. Heat index values as high as 100. Light south southwest wind.
Saturday Night
Clear, with a low around 72. Calm wind.
Sunday
Sunny, with a high near 94. Calm wind.
Sunday Night
Mostly clear, with a low around 72. Calm wind.
Monday
Sunny, with a high near 94.
Monday Night
Mostly clear, with a low around 73.
Tuesday
A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 93.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Wednesday
Mostly sunny, with a high near 87.
Wednesday Night
Partly cloudy, with a low around 65.
Thursday
Mostly sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
Charleston IL
 39.48°N 88.19°W (Elev. 650 ft)
7:40 pm CDT Aug 14, 2025
8pm CDT Aug 14, 2025-6pm CDT Aug 21, 2025
 
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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