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

57°F

14°C

Humidity 34%
Wind Speed Calm
Barometer 29.67 in (1004.7 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 18 Feb 6:53 pm CST
Extended Forecast for

Sullivan IL

  • Tonight

    Tonight: Increasing clouds, with a low around 47. South southwest wind 5 to 7 mph becoming southeast after midnight.

    Low: 47 °F

    Increasing
    Clouds

  • Thursday

    Thursday: A chance of rain, with thunderstorms also possible after noon. Mostly cloudy, with a high near 66. South southeast wind 7 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.

    High: 66 °F

    Chance Rain
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of rain before midnight. Partly cloudy, with a low around 36. Breezy, with a southwest wind 10 to 15 mph increasing to 16 to 21 mph after midnight. Winds could gust as high as 30 mph.

    Low: 36 °F

    Chance Rain
    then Mostly
    Clear and
    Breezy

  • Friday

    Friday: Mostly sunny, with a high near 45. Breezy, with a west wind 17 to 22 mph decreasing to 11 to 16 mph in the afternoon. Winds could gust as high as 33 mph.

    High: 45 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 26. West northwest wind 6 to 9 mph, with gusts as high as 15 mph.

    Low: 26 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 41. West northwest wind 7 to 11 mph, with gusts as high as 17 mph.

    High: 41 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 22. Northwest wind 9 to 14 mph, with gusts as high as 22 mph.

    Low: 22 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 34. Breezy.

    High: 34 °F

    Partly Sunny
    and Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 18.

    Low: 18 °F

    Partly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 47. South southwest wind 5 to 7 mph becoming southeast after midnight.
Thursday
A chance of rain, with thunderstorms also possible after noon. Mostly cloudy, with a high near 66. South southeast wind 7 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.
Thursday Night
A 30 percent chance of rain before midnight. Partly cloudy, with a low around 36. Breezy, with a southwest wind 10 to 15 mph increasing to 16 to 21 mph after midnight. Winds could gust as high as 30 mph.
Friday
Mostly sunny, with a high near 45. Breezy, with a west wind 17 to 22 mph decreasing to 11 to 16 mph in the afternoon. Winds could gust as high as 33 mph.
Friday Night
Mostly clear, with a low around 26. West northwest wind 6 to 9 mph, with gusts as high as 15 mph.
Saturday
Mostly sunny, with a high near 41. West northwest wind 7 to 11 mph, with gusts as high as 17 mph.
Saturday Night
Partly cloudy, with a low around 22. Northwest wind 9 to 14 mph, with gusts as high as 22 mph.
Sunday
Partly sunny, with a high near 34. Breezy.
Sunday Night
Partly cloudy, with a low around 18.
Monday
Mostly sunny, with a high near 34.
Monday Night
Partly cloudy, with a low around 18.
Tuesday
Mostly sunny, with a high near 43.
Tuesday Night
Mostly cloudy, with a low around 33.
Wednesday
A chance of rain. Partly sunny, with a high near 51.
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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 18, 2026
Forecast Valid:
7pm CST Feb 18, 2026-6pm CST Feb 25, 2026
 
Forecast Discussion
 
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Additional Resources

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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