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.

A Few Clouds

38°F

3°C

Humidity 60%
Wind Speed W 14 G 24 mph
Barometer 29.92 in (1013.9 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 20 Feb 4:53 pm CST
Extended Forecast for

Sullivan IL

  • Tonight

    Tonight: Increasing clouds, with a low around 25. West northwest wind 7 to 9 mph, with gusts as high as 21 mph.

    Low: 25 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Mostly sunny, with a high near 38. West northwest wind 8 to 13 mph, with gusts as high as 17 mph.

    High: 38 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 20. Northwest wind 9 to 15 mph, with gusts as high as 23 mph.

    Low: 20 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 30. Blustery, with a northwest wind 16 to 22 mph, with gusts as high as 32 mph.

    High: 30 °F

    Partly Sunny
    and Blustery

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 16. Northwest wind around 16 mph, with gusts as high as 26 mph.

    Low: 16 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 31. North northwest wind 8 to 16 mph, with gusts as high as 25 mph.

    High: 31 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 17. Northwest wind around 6 mph becoming calm.

    Low: 17 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 44.

    High: 44 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 33.

    Low: 33 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 25. West northwest wind 7 to 9 mph, with gusts as high as 21 mph.
Saturday
Mostly sunny, with a high near 38. West northwest wind 8 to 13 mph, with gusts as high as 17 mph.
Saturday Night
Partly cloudy, with a low around 20. Northwest wind 9 to 15 mph, with gusts as high as 23 mph.
Sunday
Partly sunny, with a high near 30. Blustery, with a northwest wind 16 to 22 mph, with gusts as high as 32 mph.
Sunday Night
Partly cloudy, with a low around 16. Northwest wind around 16 mph, with gusts as high as 26 mph.
Monday
Sunny, with a high near 31. North northwest wind 8 to 16 mph, with gusts as high as 25 mph.
Monday Night
Partly cloudy, with a low around 17. Northwest wind around 6 mph becoming calm.
Tuesday
Partly sunny, with a high near 44.
Tuesday Night
Mostly cloudy, with a low around 33.
Wednesday
Partly sunny, with a high near 55.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 29.
Thursday
Mostly sunny, with a high near 46.
Thursday Night
Mostly clear, with a low around 28.
Friday
Sunny, with a high near 55.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sullivan IL
 39.59°N 88.61°W (Elev. 669 ft)
Last Update:
5:37 pm CST Feb 20, 2026
Forecast Valid:
5pm CST Feb 20, 2026-6pm CST Feb 27, 2026
 
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Additional Resources

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Chance of Precipitation