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.

Mostly Cloudy

48°F

9°C

Humidity 42%
Wind Speed W 6 mph
Barometer 29.75 in (1007.7 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 25 Feb 3:53 pm CST
Extended Forecast for

Sullivan IL

  • Tonight

    Tonight: Rain and snow likely before 3am, then a chance of snow between 3am and 4am. Mostly cloudy, with a low around 29. Light and variable wind becoming north northeast 5 to 8 mph in the evening. Chance of precipitation is 70%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 29 °F

    Chance Rain
    then
    Rain/Snow
    Likely

  • Thursday

    Thursday: Mostly sunny, with a high near 49. East northeast wind around 6 mph becoming light and variable in the afternoon.

    High: 49 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 32. South southwest wind 3 to 6 mph.

    Low: 32 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 63. Southwest wind 7 to 15 mph, with gusts as high as 24 mph.

    High: 63 °F

    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 35. South southwest wind 7 to 10 mph becoming north northeast after midnight. Winds could gust as high as 18 mph.

    Low: 35 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Mostly sunny, with a high near 54. Northeast wind 7 to 11 mph, with gusts as high as 17 mph.

    High: 54 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 26. North northeast wind 11 to 14 mph, with gusts as high as 22 mph.

    Low: 26 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 40 percent chance of snow after noon. Mostly cloudy, with a high near 38.

    High: 38 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday Night

    Sunday Night: Snow likely, mainly before midnight. Cloudy, with a low around 22. Chance of precipitation is 60%.

    Low: 22 °F

    Snow Likely

Detailed Forecast

Tonight
Rain and snow likely before 3am, then a chance of snow between 3am and 4am. Mostly cloudy, with a low around 29. Light and variable wind becoming north northeast 5 to 8 mph in the evening. Chance of precipitation is 70%. Total nighttime snow accumulation of less than a half inch possible.
Thursday
Mostly sunny, with a high near 49. East northeast wind around 6 mph becoming light and variable in the afternoon.
Thursday Night
Clear, with a low around 32. South southwest wind 3 to 6 mph.
Friday
Sunny, with a high near 63. Southwest wind 7 to 15 mph, with gusts as high as 24 mph.
Friday Night
Increasing clouds, with a low around 35. South southwest wind 7 to 10 mph becoming north northeast after midnight. Winds could gust as high as 18 mph.
Saturday
Mostly sunny, with a high near 54. Northeast wind 7 to 11 mph, with gusts as high as 17 mph.
Saturday Night
Mostly cloudy, with a low around 26. North northeast wind 11 to 14 mph, with gusts as high as 22 mph.
Sunday
A 40 percent chance of snow after noon. Mostly cloudy, with a high near 38.
Sunday Night
Snow likely, mainly before midnight. Cloudy, with a low around 22. Chance of precipitation is 60%.
Monday
Partly sunny, with a high near 34.
Monday Night
A chance of snow and freezing rain. Cloudy, with a low around 22.
Tuesday
A chance of rain. Mostly cloudy, with a high near 38.
Tuesday Night
A chance of rain. Partly cloudy, with a low around 28.
Wednesday
A chance of rain. Partly sunny, with a high near 44.
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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:
3:36 pm CST Feb 25, 2026
Forecast Valid:
4pm CST Feb 25, 2026-6pm CST Mar 4, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation