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.

Fair

53°F

12°C

Humidity 40%
Wind Speed SE 9 mph
Barometer 29.93 in (1013.7 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 14 Mar 6:53 pm CDT
Extended Forecast for

Sullivan IL

Wind Advisory March 15, 10:00am until March 16, 07:00am
Click here for hazard details and duration
Wind Advisory

  • Tonight

    Tonight: Mostly cloudy, with a low around 45. East southeast wind 11 to 15 mph, with gusts as high as 23 mph.

    Low: 45 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of showers before 1pm, then a chance of showers and thunderstorms between 1pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 64. Windy, with a south wind 20 to 30 mph, with gusts as high as 49 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 64 °F

    Chance
    Showers and
    Breezy then
    Showers
    Likely and
    Windy

  • Sunday Night

    Sunday Night: Rain showers before 11pm, then rain and snow showers between 11pm and 1am, then a chance of snow after 1am. Some thunder is also possible. Low around 20. Blustery, with a west southwest wind 23 to 26 mph, with gusts as high as 45 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 20 °F

    Rain/Snow and
    Blustery

  • Monday

    Monday: A 30 percent chance of snow before 1pm. Cloudy, with a high near 25. Wind chill values between 4 and 9. Blustery, with a west northwest wind 24 to 26 mph, with gusts as high as 47 mph.

    High: 25 °F

    Chance Snow
    and Blustery

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 10. Blustery, with a west northwest wind 14 to 20 mph, with gusts as high as 31 mph.

    Low: 10 °F

    Mostly Cloudy
    and Blustery
    then Mostly
    Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 30. West northwest wind 7 to 10 mph, with gusts as high as 17 mph.

    High: 30 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of snow after 1am. Mostly cloudy, with a low around 24. South wind 6 to 16 mph, with gusts as high as 25 mph.

    Low: 24 °F

    Mostly Cloudy
    then Chance
    Snow

  • Wednesday

    Wednesday: Mostly sunny, with a high near 55.

    High: 55 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 45. East southeast wind 11 to 15 mph, with gusts as high as 23 mph.
Sunday
A chance of showers before 1pm, then a chance of showers and thunderstorms between 1pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 64. Windy, with a south wind 20 to 30 mph, with gusts as high as 49 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Rain showers before 11pm, then rain and snow showers between 11pm and 1am, then a chance of snow after 1am. Some thunder is also possible. Low around 20. Blustery, with a west southwest wind 23 to 26 mph, with gusts as high as 45 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Monday
A 30 percent chance of snow before 1pm. Cloudy, with a high near 25. Wind chill values between 4 and 9. Blustery, with a west northwest wind 24 to 26 mph, with gusts as high as 47 mph.
Monday Night
Mostly cloudy, with a low around 10. Blustery, with a west northwest wind 14 to 20 mph, with gusts as high as 31 mph.
Tuesday
Mostly sunny, with a high near 30. West northwest wind 7 to 10 mph, with gusts as high as 17 mph.
Tuesday Night
A 50 percent chance of snow after 1am. Mostly cloudy, with a low around 24. South wind 6 to 16 mph, with gusts as high as 25 mph.
Wednesday
Mostly sunny, with a high near 55.
Wednesday Night
Partly cloudy, with a low around 35.
Thursday
Mostly sunny, with a high near 65.
Thursday Night
Partly cloudy, with a low around 42.
Friday
Mostly sunny, with a high near 67.
Friday Night
Mostly cloudy, with a low around 44.
Saturday
Mostly sunny, with a high near 71.
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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:
6:35 pm CDT Mar 14, 2026
Forecast Valid:
7pm CDT Mar 14, 2026-6pm CDT Mar 21, 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