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.

Overcast

28°F

-2°C

Humidity 85%
Wind Speed S 15 mph
Barometer 30.05 in (1018.6 mb)
Dewpoint 24°F (-4°C)
Visibility 9.00 mi
Wind Chill16°F (-9°C)
Last update 3 Dec 12:53 pm CST
Extended Forecast for

Sullivan IL

  • This Afternoon

    This Afternoon: A 30 percent chance of snow after 5pm. Cloudy, with a high near 32. Southwest wind 7 to 10 mph, with gusts as high as 18 mph.

    High: 32 °F

    Chance Snow

  • Tonight

    Tonight: A 30 percent chance of snow, mainly before 11pm. Cloudy, with a low around 5. Wind chill values between -5 and zero. West wind 6 to 13 mph becoming north after midnight. Winds could gust as high as 21 mph.

    Low: 5 °F

    Chance Snow
    then Cloudy

  • Thursday

    Thursday: Mostly cloudy through mid morning, then gradual clearing, with a high near 16. Wind chill values between -8 and 2. North wind 5 to 8 mph becoming calm in the afternoon.

    High: 16 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 0. Calm wind becoming south around 5 mph after midnight.

    Low: 0 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 29. South southwest wind around 6 mph.

    High: 29 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 16. South southwest wind 3 to 6 mph.

    Low: 16 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 30. Light and variable wind.

    High: 30 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 18.

    Low: 18 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 29.

    High: 29 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
A 30 percent chance of snow after 5pm. Cloudy, with a high near 32. Southwest wind 7 to 10 mph, with gusts as high as 18 mph.
Tonight
A 30 percent chance of snow, mainly before 11pm. Cloudy, with a low around 5. Wind chill values between -5 and zero. West wind 6 to 13 mph becoming north after midnight. Winds could gust as high as 21 mph.
Thursday
Mostly cloudy through mid morning, then gradual clearing, with a high near 16. Wind chill values between -8 and 2. North wind 5 to 8 mph becoming calm in the afternoon.
Thursday Night
Partly cloudy, with a low around 0. Calm wind becoming south around 5 mph after midnight.
Friday
Mostly sunny, with a high near 29. South southwest wind around 6 mph.
Friday Night
Mostly cloudy, with a low around 16. South southwest wind 3 to 6 mph.
Saturday
Partly sunny, with a high near 30. Light and variable wind.
Saturday Night
Mostly cloudy, with a low around 18.
Sunday
Mostly cloudy, with a high near 29.
Sunday Night
Mostly cloudy, with a low around 16.
Monday
Partly sunny, with a high near 28.
Monday Night
Mostly cloudy, with a low around 19.
Tuesday
Partly sunny, with a high near 34.
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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:
12:36 pm CST Dec 3, 2025
Forecast Valid:
1pm CST Dec 3, 2025-6pm CST Dec 9, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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