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

17°F

-8°C

Humidity 80%
Wind Speed NW 18 mph
Barometer 30.38 in (1030.1 mb)
Dewpoint 12°F (-11°C)
Visibility 9.00 mi
Wind Chill1°F (-17°C)
Last update 31 Jan 1:53 pm CST
Extended Forecast for

Sullivan IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 19. Wind chill values between 3 and 8. Northwest wind 9 to 14 mph, with gusts as high as 21 mph.

    High: 19 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 0. Northwest wind 5 to 8 mph becoming calm after midnight.

    Low: 0 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 20 percent chance of snow after 3pm. Partly sunny, with a high near 24. Wind chill values between -6 and 4. Light and variable wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 15 mph.

    High: 24 °F

    Mostly Sunny
    then Slight
    Chance Snow

  • Sunday Night

    Sunday Night: A 40 percent chance of snow before midnight. Mostly cloudy, with a low around 15. South wind around 7 mph.

    Low: 15 °F

    Chance Snow
    then Mostly
    Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 31. West wind 5 to 7 mph.

    High: 31 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 19. Light and variable wind.

    Low: 19 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of snow after noon. Mostly cloudy, with a high near 27. Northeast wind 5 to 8 mph.

    High: 27 °F

    Cloudy then
    Chance Snow

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 10.

    Low: 10 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 22.

    High: 22 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 19. Wind chill values between 3 and 8. Northwest wind 9 to 14 mph, with gusts as high as 21 mph.
Tonight
Mostly cloudy, with a low around 0. Northwest wind 5 to 8 mph becoming calm after midnight.
Sunday
A 20 percent chance of snow after 3pm. Partly sunny, with a high near 24. Wind chill values between -6 and 4. Light and variable wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 15 mph.
Sunday Night
A 40 percent chance of snow before midnight. Mostly cloudy, with a low around 15. South wind around 7 mph.
Monday
Mostly cloudy, with a high near 31. West wind 5 to 7 mph.
Monday Night
Mostly cloudy, with a low around 19. Light and variable wind.
Tuesday
A 30 percent chance of snow after noon. Mostly cloudy, with a high near 27. Northeast wind 5 to 8 mph.
Tuesday Night
Mostly cloudy, with a low around 10.
Wednesday
Mostly sunny, with a high near 22.
Wednesday Night
Partly cloudy, with a low around 6.
Thursday
Partly sunny, with a high near 29.
Thursday Night
Mostly cloudy, with a low around 22.
Friday
Partly sunny, with a high near 36.
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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:
1:46 pm CST Jan 31, 2026
Forecast Valid:
2pm CST Jan 31, 2026-6pm CST Feb 6, 2026
 
Forecast Discussion
 
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Additional Resources

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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