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

40°F

4°C

Humidity 63%
Wind Speed Calm
Barometer 29.82 in (1010.0 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 25 Feb 8:53 pm CST
Extended Forecast for

Sullivan IL

  • Tonight

    Tonight: Rain and snow likely before 3am, then a chance of snow between 3am and 5am. Mostly cloudy, with a low around 29. North wind 5 to 8 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 29 °F

    Slight Chance
    Rain then
    Rain/Snow
    Likely

  • Thursday

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

    High: 49 °F

    Decreasing
    Clouds

  • 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 5am. Mostly cloudy, with a low around 29. North wind 5 to 8 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of less than a half inch possible.
Thursday
Mostly cloudy, then gradually becoming 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:
9:01 pm CST Feb 25, 2026
Forecast Valid:
9pm CST Feb 25, 2026-6pm CST Mar 4, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation