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.

Fair

73°F

23°C

Humidity 69%
Wind Speed S 3 mph
Barometer 30.17 in (1020.9 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 3 Oct 8:53 pm CDT
Extended Forecast for

Sullivan IL

  • Tonight

    Tonight: Mostly clear, with a low around 62. South southwest wind around 6 mph.

    Low: 62 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 87. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 87 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 56. South southeast wind around 6 mph.

    Low: 56 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 86. South wind 6 to 11 mph, with gusts as high as 20 mph.

    High: 86 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 61. South wind around 7 mph.

    Low: 61 °F

    Mostly Clear

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 86. South southwest wind 5 to 7 mph.

    High: 86 °F

    Sunny then
    Chance
    T-storms

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 61. South southwest wind 3 to 6 mph.

    Low: 61 °F

    Partly Cloudy
    then Chance
    T-storms

  • Tuesday

    Tuesday: A 40 percent chance of showers. Partly sunny, with a high near 78.

    High: 78 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 52.

    Low: 52 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 62. South southwest wind around 6 mph.
Saturday
Sunny, with a high near 87. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Saturday Night
Clear, with a low around 56. South southeast wind around 6 mph.
Sunday
Sunny, with a high near 86. South wind 6 to 11 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 61. South wind around 7 mph.
Monday
A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 86. South southwest wind 5 to 7 mph.
Monday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 61. South southwest wind 3 to 6 mph.
Tuesday
A 40 percent chance of showers. Partly sunny, with a high near 78.
Tuesday Night
Partly cloudy, with a low around 52.
Wednesday
Sunny, with a high near 73.
Wednesday Night
Mostly clear, with a low around 45.
Thursday
Sunny, with a high near 73.
Thursday Night
Mostly clear, with a low around 45.
Friday
Sunny, with a high near 77.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sullivan IL
 39.59°N 88.61°W (Elev. 669 ft)
Last Update:
9:36 pm CDT Oct 3, 2025
Forecast Valid:
9pm CDT Oct 3, 2025-6pm CDT Oct 10, 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