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.

A Few Clouds

47°F

8°C

Humidity 42%
Wind Speed SW 5 mph
Barometer 30.14 in (1021.2 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 12 Mar 4:53 pm CDT
Extended Forecast for

Sullivan IL

Wind Advisory March 12, 10:00pm until March 13, 04:00pm
Click here for hazard details and duration
Wind Advisory

  • Tonight

    Tonight: Mostly cloudy, with a low around 41. Breezy, with a south wind 10 to 15 mph increasing to 19 to 24 mph after midnight. Winds could gust as high as 41 mph.

    Low: 41 °F

    Mostly Cloudy
    and Breezy

  • Friday

    Friday: Mostly sunny, with a high near 53. Breezy, with a west wind 20 to 25 mph, with gusts as high as 45 mph.

    High: 53 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 31. West northwest wind 5 to 10 mph becoming northeast after midnight. Winds could gust as high as 17 mph.

    Low: 31 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 55. East southeast wind 6 to 13 mph, with gusts as high as 20 mph.

    High: 55 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 46. East southeast wind 10 to 14 mph, with gusts as high as 24 mph.

    Low: 46 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of rain, then rain and possibly a thunderstorm after 1pm. High near 65. Breezy, with a south southeast wind 17 to 26 mph, with gusts as high as 44 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 65 °F

    Breezy.
    Chance Rain
    then Rain

  • Sunday Night

    Sunday Night: Rain and snow. Some thunder is also possible. Low around 20. Blustery, with a south southwest wind 23 to 28 mph becoming west northwest after midnight. Winds could gust as high as 41 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 20 °F

    Rain/Snow and
    Blustery

  • Monday

    Monday: A 30 percent chance of snow before 1pm. Mostly cloudy, with a high near 24. Blustery.

    High: 24 °F

    Chance Snow
    and Blustery

  • Monday Night

    Monday Night: Partly cloudy, with a low around 9.

    Low: 9 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 41. Breezy, with a south wind 10 to 15 mph increasing to 19 to 24 mph after midnight. Winds could gust as high as 41 mph.
Friday
Mostly sunny, with a high near 53. Breezy, with a west wind 20 to 25 mph, with gusts as high as 45 mph.
Friday Night
Mostly cloudy, with a low around 31. West northwest wind 5 to 10 mph becoming northeast after midnight. Winds could gust as high as 17 mph.
Saturday
Mostly cloudy, with a high near 55. East southeast wind 6 to 13 mph, with gusts as high as 20 mph.
Saturday Night
Mostly cloudy, with a low around 46. East southeast wind 10 to 14 mph, with gusts as high as 24 mph.
Sunday
A chance of rain, then rain and possibly a thunderstorm after 1pm. High near 65. Breezy, with a south southeast wind 17 to 26 mph, with gusts as high as 44 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Rain and snow. Some thunder is also possible. Low around 20. Blustery, with a south southwest wind 23 to 28 mph becoming west northwest after midnight. Winds could gust as high as 41 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Monday
A 30 percent chance of snow before 1pm. Mostly cloudy, with a high near 24. Blustery.
Monday Night
Partly cloudy, with a low around 9.
Tuesday
Mostly sunny, with a high near 27.
Tuesday Night
A chance of snow. Mostly cloudy, with a low around 18.
Wednesday
Mostly cloudy, with a high near 44.
Wednesday Night
Mostly cloudy, with a low around 33.
Thursday
Mostly sunny, with a high near 58.
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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:
4:36 pm CDT Mar 12, 2026
Forecast Valid:
5pm CDT Mar 12, 2026-6pm CDT Mar 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation