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

34°F

1°C

Humidity 85%
Wind Speed NW 8 mph
Barometer 30.06 in (1018.7 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 6 Feb 5:53 pm CST
Extended Forecast for

Sullivan IL

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 12. Wind chill values between 3 and 8. North wind 8 to 15 mph, with gusts as high as 23 mph.

    Low: 12 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 27. Wind chill values between 1 and 11. North wind 5 to 8 mph becoming light and variable.

    High: 27 °F

    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 19. Light southeast wind becoming south southeast 5 to 10 mph in the evening. Winds could gust as high as 17 mph.

    Low: 19 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly sunny, with a high near 37. South southeast wind 7 to 10 mph, with gusts as high as 17 mph.

    High: 37 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 24. East southeast wind 3 to 6 mph.

    Low: 24 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 49. South southwest wind 3 to 7 mph.

    High: 49 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 34. South wind around 7 mph.

    Low: 34 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 58.

    High: 58 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Rain likely, mainly before midnight. Mostly cloudy, with a low around 36. Chance of precipitation is 60%.

    Low: 36 °F

    Rain Likely

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming clear, with a low around 12. Wind chill values between 3 and 8. North wind 8 to 15 mph, with gusts as high as 23 mph.
Saturday
Sunny, with a high near 27. Wind chill values between 1 and 11. North wind 5 to 8 mph becoming light and variable.
Saturday Night
Increasing clouds, with a low around 19. Light southeast wind becoming south southeast 5 to 10 mph in the evening. Winds could gust as high as 17 mph.
Sunday
Mostly sunny, with a high near 37. South southeast wind 7 to 10 mph, with gusts as high as 17 mph.
Sunday Night
Partly cloudy, with a low around 24. East southeast wind 3 to 6 mph.
Monday
Mostly sunny, with a high near 49. South southwest wind 3 to 7 mph.
Monday Night
Mostly clear, with a low around 34. South wind around 7 mph.
Tuesday
Mostly cloudy, with a high near 58.
Tuesday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 36. Chance of precipitation is 60%.
Wednesday
A 30 percent chance of rain before noon. Partly sunny, with a high near 45.
Wednesday Night
Mostly cloudy, with a low around 26.
Thursday
Mostly cloudy, with a high near 40.
Thursday Night
Mostly cloudy, with a low around 25.
Friday
Partly sunny, with a high near 41.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sullivan IL
 39.59°N 88.61°W (Elev. 669 ft)
Last Update:
6:36 pm CST Feb 6, 2026
Forecast Valid:
6pm CST Feb 6, 2026-6pm CST Feb 13, 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