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

58°F

14°C

Humidity 97%
Wind Speed NW 15 G 25 mph
Barometer 29.67 in (1004.2 mb)
Dewpoint 57°F (14°C)
Visibility 1.00 mi
Last update 11 Mar 5:53 am CDT
Extended Forecast for

Sullivan IL

  • Today

    Today: Showers and possibly a thunderstorm before 2pm, then a chance of showers. Temperature falling to around 41 by 4pm. Breezy, with a west southwest wind 16 to 22 mph becoming northwest in the afternoon. Winds could gust as high as 34 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 63 °F⇓

    T-storms then
    Showers and
    Breezy

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 28. Blustery, with a northwest wind 15 to 20 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 31 mph.

    Low: 28 °F

    Mostly Cloudy
    and Blustery
    then Mostly
    Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 49. West wind 6 to 11 mph, with gusts as high as 18 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
    and Breezy

  • Friday

    Friday: Partly sunny, with a high near 55. Breezy, with a southwest wind 16 to 22 mph becoming west northwest in the afternoon. Winds could gust as high as 34 mph.

    High: 55 °F

    Partly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 33. West northwest wind 6 to 9 mph becoming northeast after midnight. Winds could gust as high as 16 mph.

    Low: 33 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 54. East southeast wind 8 to 13 mph, with gusts as high as 20 mph.

    High: 54 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 47.

    Low: 47 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers, mainly after 1pm. High near 60. Breezy. Chance of precipitation is 80%.

    High: 60 °F

    Breezy.
    Chance
    Showers then
    Showers

Detailed Forecast

Today
Showers and possibly a thunderstorm before 2pm, then a chance of showers. Temperature falling to around 41 by 4pm. Breezy, with a west southwest wind 16 to 22 mph becoming northwest in the afternoon. Winds could gust as high as 34 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 28. Blustery, with a northwest wind 15 to 20 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 31 mph.
Thursday
Increasing clouds, with a high near 49. West wind 6 to 11 mph, with gusts as high as 18 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
Partly sunny, with a high near 55. Breezy, with a southwest wind 16 to 22 mph becoming west northwest in the afternoon. Winds could gust as high as 34 mph.
Friday Night
Mostly cloudy, with a low around 33. West northwest wind 6 to 9 mph becoming northeast after midnight. Winds could gust as high as 16 mph.
Saturday
Mostly cloudy, with a high near 54. East southeast wind 8 to 13 mph, with gusts as high as 20 mph.
Saturday Night
Mostly cloudy, with a low around 47.
Sunday
Showers, mainly after 1pm. High near 60. Breezy. Chance of precipitation is 80%.
Sunday Night
A chance of rain and snow showers before 1am. Mostly cloudy, with a low around 21. Blustery. Chance of precipitation is 50%.
Monday
Mostly sunny, with a high near 31. Blustery.
Monday Night
Partly cloudy, with a low around 15.
Tuesday
Partly sunny, with a high near 35.
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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:
5:26 am CDT Mar 11, 2026
Forecast Valid:
6am CDT Mar 11, 2026-6pm CDT Mar 17, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation