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

66°F

19°C

Humidity 90%
Wind Speed S 10 G 22 mph
Barometer 29.90 in (1012.2 mb)
Dewpoint 63°F (17°C)
Visibility 7.00 mi
Last update 10 Mar 10:53 am CDT
Extended Forecast for

Sullivan IL

  • Today

    Today: Partly sunny, with a high near 76. South wind 14 to 17 mph, with gusts as high as 26 mph.

    High: 76 °F

    Partly Sunny

  • Tonight

    Tonight: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4am. Low around 58. South southwest wind 16 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 58 °F

    Chance
    T-storms then
    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before 1pm, then a chance of showers. Temperature falling to around 46 by 5pm. Breezy, with a southwest wind 17 to 21 mph becoming northwest in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 64 °F⇓

    T-storms then
    Showers and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 30. Blustery, with a north northwest wind 15 to 20 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 29 mph.

    Low: 30 °F

    Mostly Cloudy
    and Blustery
    then Partly
    Cloudy

  • Thursday

    Thursday: Increasing clouds, with a high near 49. Northwest wind 6 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 17 mph.

    High: 49 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 41. Breezy, with a south wind 10 to 15 mph increasing to 18 to 23 mph after midnight. Winds could gust as high as 36 mph.

    Low: 41 °F

    Mostly Cloudy
    then Mostly
    Cloudy and
    Breezy

  • Friday

    Friday: Mostly cloudy, with a high near 56. Breezy, with a southwest wind 15 to 22 mph becoming west northwest in the afternoon. Winds could gust as high as 33 mph.

    High: 56 °F

    Mostly Cloudy
    and Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 60.

    High: 60 °F

    Partly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 76. South wind 14 to 17 mph, with gusts as high as 26 mph.
Tonight
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4am. Low around 58. South southwest wind 16 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
Showers and possibly a thunderstorm before 1pm, then a chance of showers. Temperature falling to around 46 by 5pm. Breezy, with a southwest wind 17 to 21 mph becoming northwest in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 30. Blustery, with a north northwest wind 15 to 20 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 29 mph.
Thursday
Increasing clouds, with a high near 49. Northwest wind 6 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 17 mph.
Thursday Night
Mostly cloudy, with a low around 41. Breezy, with a south wind 10 to 15 mph increasing to 18 to 23 mph after midnight. Winds could gust as high as 36 mph.
Friday
Mostly cloudy, with a high near 56. Breezy, with a southwest wind 15 to 22 mph becoming west northwest in the afternoon. Winds could gust as high as 33 mph.
Friday Night
Mostly cloudy, with a low around 34.
Saturday
Partly sunny, with a high near 60.
Saturday Night
Mostly cloudy, with a low around 45.
Sunday
Rain. Cloudy, with a high near 57. Breezy.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 20. Blustery.
Monday
Partly sunny, with a high near 32.
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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:
10:36 am CDT Mar 10, 2026
Forecast Valid:
11am CDT Mar 10, 2026-6pm CDT Mar 16, 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