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.

Light Snow Fog/Mist

25°F

-4°C

Humidity 96%
Wind Speed SE 3 mph
Barometer 30.09 in (1020.0 mb)
Dewpoint 24°F (-4°C)
Visibility 1.75 mi
Last update 1 Dec 6:53 pm CST
Extended Forecast for

Sullivan IL

Winter Weather Advisory until December 2, 06:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory until December 2, 06:00am

    NOW until 6:00am Tue

    Winter Weather Advisory

  • Tonight

    Low: 16 °F

    Snow then
    Snow Likely

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 22. Northwest wind 5 to 7 mph becoming calm in the afternoon.

    High: 22 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 14. South wind 3 to 8 mph.

    Low: 14 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 33. South southwest wind 6 to 9 mph, with gusts as high as 16 mph.

    High: 33 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 5. West wind 6 to 10 mph becoming north northwest in the evening. Winds could gust as high as 16 mph.

    Low: 5 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 13. North northwest wind 5 to 9 mph becoming calm in the afternoon. Winds could gust as high as 15 mph.

    High: 13 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around -2. Light and variable wind.

    Low: -2 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 29.

    High: 29 °F

    Mostly Sunny

Detailed Forecast

Tonight
Snow, mainly before 1am. Low around 16. Calm wind becoming west northwest 5 to 7 mph after midnight. Chance of precipitation is 100%. Total nighttime snow accumulation of 1 to 3 inches possible.
Tuesday
Mostly cloudy, with a high near 22. Northwest wind 5 to 7 mph becoming calm in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 14. South wind 3 to 8 mph.
Wednesday
Partly sunny, with a high near 33. South southwest wind 6 to 9 mph, with gusts as high as 16 mph.
Wednesday Night
Mostly cloudy, with a low around 5. West wind 6 to 10 mph becoming north northwest in the evening. Winds could gust as high as 16 mph.
Thursday
Sunny, with a high near 13. North northwest wind 5 to 9 mph becoming calm in the afternoon. Winds could gust as high as 15 mph.
Thursday Night
Partly cloudy, with a low around -2. Light and variable wind.
Friday
Mostly sunny, with a high near 29.
Friday Night
Mostly cloudy, with a low around 18.
Saturday
Mostly cloudy, with a high near 31.
Saturday Night
Mostly cloudy, with a low around 20.
Sunday
Mostly cloudy, with a high near 30.
Sunday Night
Mostly cloudy, with a low around 11.
Monday
Partly sunny, with a high near 29.
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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:
6:36 pm CST Dec 1, 2025
Forecast Valid:
7pm CST Dec 1, 2025-6pm CST Dec 8, 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