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

43°F

6°C

Humidity 49%
Wind Speed SE 15 mph
Barometer 30.28 in (1025.7 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 8 Apr 7:53 am CDT
Extended Forecast for

Sullivan IL

  • Today

    Today: Mostly sunny, with a high near 70. Breezy, with a south wind 11 to 20 mph, with gusts as high as 30 mph.

    High: 70 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 53. South wind around 14 mph, with gusts as high as 24 mph.

    Low: 53 °F

    Mostly Clear

  • Thursday

    Thursday: A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 75. Southwest wind 11 to 14 mph, with gusts as high as 22 mph.

    High: 75 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 56. South wind 7 to 11 mph, with gusts as high as 20 mph.

    Low: 56 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers likely. Mostly cloudy, with a high near 66. South southwest wind 9 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 66 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 46. Northeast wind around 7 mph.

    Low: 46 °F

    Chance
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 66. East northeast wind around 8 mph.

    High: 66 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 55.

    Low: 55 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 78.

    High: 78 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 70. Breezy, with a south wind 11 to 20 mph, with gusts as high as 30 mph.
Tonight
Mostly clear, with a low around 53. South wind around 14 mph, with gusts as high as 24 mph.
Thursday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 75. Southwest wind 11 to 14 mph, with gusts as high as 22 mph.
Thursday Night
A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 56. South wind 7 to 11 mph, with gusts as high as 20 mph.
Friday
Showers likely. Mostly cloudy, with a high near 66. South southwest wind 9 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 46. Northeast wind around 7 mph.
Saturday
Partly sunny, with a high near 66. East northeast wind around 8 mph.
Saturday Night
Mostly cloudy, with a low around 55.
Sunday
Partly sunny, with a high near 78.
Sunday Night
A 50 percent chance of showers after 1am. Mostly cloudy, with a low around 62.
Monday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 78. Breezy.
Monday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 63.
Tuesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 77.
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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:
5:36 am CDT Apr 8, 2026
Forecast Valid:
8am CDT Apr 8, 2026-6pm CDT Apr 14, 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