National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

Fair

55°F

13°C

Humidity 72%
Wind Speed S 10 mph
Barometer 29.91 in (1012.7 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 20 Mar 8:53 am CDT
Extended Forecast for

Sullivan IL

  • Today

    Today: Mostly sunny, with a high near 80. West southwest wind 9 to 15 mph, with gusts as high as 24 mph.

    High: 80 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 44. North northwest wind 6 to 9 mph becoming east northeast after midnight. Winds could gust as high as 15 mph.

    Low: 44 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 77. East wind 6 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph.

    High: 77 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 56. South southwest wind 7 to 11 mph, with gusts as high as 20 mph.

    Low: 56 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 82. South southwest wind 13 to 17 mph becoming west in the afternoon. Winds could gust as high as 28 mph.

    High: 82 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 36. North wind 15 to 18 mph, with gusts as high as 28 mph.

    Low: 36 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 52. North wind 9 to 13 mph, with gusts as high as 21 mph.

    High: 52 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 58.

    High: 58 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 80. West southwest wind 9 to 15 mph, with gusts as high as 24 mph.
Tonight
Partly cloudy, with a low around 44. North northwest wind 6 to 9 mph becoming east northeast after midnight. Winds could gust as high as 15 mph.
Saturday
Sunny, with a high near 77. East wind 6 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph.
Saturday Night
Mostly clear, with a low around 56. South southwest wind 7 to 11 mph, with gusts as high as 20 mph.
Sunday
Mostly sunny, with a high near 82. South southwest wind 13 to 17 mph becoming west in the afternoon. Winds could gust as high as 28 mph.
Sunday Night
Partly cloudy, with a low around 36. North wind 15 to 18 mph, with gusts as high as 28 mph.
Monday
Sunny, with a high near 52. North wind 9 to 13 mph, with gusts as high as 21 mph.
Monday Night
Partly cloudy, with a low around 35.
Tuesday
Partly sunny, with a high near 58.
Tuesday Night
Mostly cloudy, with a low around 39.
Wednesday
Partly sunny, with a high near 60.
Wednesday Night
Mostly cloudy, with a low around 46.
Thursday
Mostly sunny, with a high near 72.
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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:
9:36 am CDT Mar 20, 2026
Forecast Valid:
9am CDT Mar 20, 2026-6pm CDT Mar 26, 2026
 
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Additional Resources

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