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.

Thunderstorm Heavy Rain Fog/Mist and Windy

51°F

11°C

Humidity 96%
Wind Speed N 33 G 46 mph
Barometer 29.91 in (1012.6 mb)
Dewpoint 50°F (10°C)
Visibility 1.00 mi
Wind Chill43°F (6°C)
Last update 26 Mar 9:53 pm CDT
Extended Forecast for

Sullivan IL

Severe T-storm Watch March 26, 10:39pm until March 26, 11:00pm
Click here for hazard details and duration
...
  •  
    Severe T-storm Watch March 26, 10:39pm until March 26, 11:00pm

    NOW until 11:00pm Thu

    Severe T-storm Watch

  • Tonight

    Low: 35 °F

    Breezy.
    T-storms then
    Showers

  • Friday

    Friday: Cloudy, then gradually becoming mostly sunny, with a high near 47. North wind 15 to 18 mph, with gusts as high as 31 mph.

    High: 47 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly clear, with a low around 27. North northwest wind 6 to 11 mph, with gusts as high as 20 mph.

    Low: 27 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 50. North wind 5 to 8 mph becoming south in the afternoon.

    High: 50 °F

    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 39. South wind 7 to 9 mph, with gusts as high as 16 mph.

    Low: 39 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy, with a high near 60. South wind 10 to 14 mph, with gusts as high as 22 mph.

    High: 60 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 52. South wind 9 to 11 mph, with gusts as high as 21 mph.

    Low: 52 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

Detailed Forecast

Tonight
Showers and thunderstorms before 4am, then a chance of showers. Low around 35. Breezy, with a north wind 21 to 23 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Friday
Cloudy, then gradually becoming mostly sunny, with a high near 47. North wind 15 to 18 mph, with gusts as high as 31 mph.
Friday Night
Mostly clear, with a low around 27. North northwest wind 6 to 11 mph, with gusts as high as 20 mph.
Saturday
Sunny, with a high near 50. North wind 5 to 8 mph becoming south in the afternoon.
Saturday Night
Increasing clouds, with a low around 39. South wind 7 to 9 mph, with gusts as high as 16 mph.
Sunday
Mostly cloudy, with a high near 60. South wind 10 to 14 mph, with gusts as high as 22 mph.
Sunday Night
Mostly cloudy, with a low around 52. South wind 9 to 11 mph, with gusts as high as 21 mph.
Monday
Mostly sunny, with a high near 77.
Monday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 60.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 81. Breezy.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 54.
Wednesday
A chance of showers. Mostly cloudy, with a high near 72. Breezy.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 52.
Thursday
Showers likely. Mostly cloudy, with a high near 68.
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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:
9:16 pm CDT Mar 26, 2026
Forecast Valid:
10pm CDT Mar 26, 2026-6pm CDT Apr 2, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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