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

21°F

-6°C

Humidity 78%
Wind Speed S 12 mph
Barometer 30.19 in (1023.4 mb)
Dewpoint 15°F (-9°C)
Visibility 4.00 mi
Wind Chill9°F (-13°C)
Last update 1 Feb 9:53 pm CST
Extended Forecast for

Sullivan IL

  • Tonight

    Tonight: A 40 percent chance of snow, mainly before 11pm. Cloudy, with a low around 19. South southwest wind 7 to 9 mph, with gusts as high as 20 mph.

    Low: 19 °F

    Chance Snow

  • Monday

    Monday: Mostly cloudy, with a high near 29. West northwest wind 5 to 9 mph.

    High: 29 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 17. Light and variable wind.

    Low: 17 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 28. Northeast wind 3 to 7 mph.

    High: 28 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 10. North wind around 6 mph.

    Low: 10 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 24. North wind around 6 mph.

    High: 24 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 8. Calm wind becoming west around 5 mph after midnight.

    Low: 8 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 31.

    High: 31 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 40 percent chance of snow, mainly before 11pm. Cloudy, with a low around 19. South southwest wind 7 to 9 mph, with gusts as high as 20 mph.
Monday
Mostly cloudy, with a high near 29. West northwest wind 5 to 9 mph.
Monday Night
Mostly cloudy, with a low around 17. Light and variable wind.
Tuesday
Mostly cloudy, with a high near 28. Northeast wind 3 to 7 mph.
Tuesday Night
Mostly cloudy, with a low around 10. North wind around 6 mph.
Wednesday
Mostly sunny, with a high near 24. North wind around 6 mph.
Wednesday Night
Partly cloudy, with a low around 8. Calm wind becoming west around 5 mph after midnight.
Thursday
Partly sunny, with a high near 31.
Thursday Night
Partly cloudy, with a low around 24.
Friday
Partly sunny, with a high near 36.
Friday Night
Partly cloudy, with a low around 13.
Saturday
Mostly sunny, with a high near 26.
Saturday Night
Partly cloudy, with a low around 17.
Sunday
Partly sunny, with a high near 33.
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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 CST Feb 1, 2026
Forecast Valid:
10pm CST Feb 1, 2026-6pm CST Feb 8, 2026
 
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