Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

Fair

79°F

26°C

Humidity 35%
Wind Speed S 8 mph
Barometer 29.79 in (1008.6 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 21 Mar 3:53 pm CDT
Extended Forecast for

Sullivan IL

  • Tonight

    Tonight: Mostly clear, with a low around 60. South southwest wind 7 to 11 mph, with gusts as high as 22 mph.

    Low: 60 °F

    Mostly Clear

  • Sunday

    Sunday: A 20 percent chance of showers after 3pm.  Increasing clouds, with a high near 80. Breezy, with a south southwest wind 11 to 16 mph becoming north 17 to 22 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 80 °F

    Mostly Sunny
    then Slight
    Chance
    Showers and
    Breezy

  • Sunday Night

    Sunday Night: A 10 percent chance of showers before 7pm.  Mostly cloudy, then gradually becoming mostly clear, with a low around 32. Breezy, with a north wind 13 to 23 mph, with gusts as high as 36 mph.

    Low: 32 °F

    Slight Chance
    Showers and
    Breezy then
    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 51. North wind around 10 mph, with gusts as high as 17 mph.

    High: 51 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 34. East wind around 6 mph.

    Low: 34 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 60. South wind 6 to 8 mph.

    High: 60 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 42. South southeast wind 5 to 7 mph.

    Low: 42 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 66.

    High: 66 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 51.

    Low: 51 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 60. South southwest wind 7 to 11 mph, with gusts as high as 22 mph.
Sunday
A 20 percent chance of showers after 3pm. Increasing clouds, with a high near 80. Breezy, with a south southwest wind 11 to 16 mph becoming north 17 to 22 mph in the afternoon. Winds could gust as high as 30 mph.
Sunday Night
A 10 percent chance of showers before 7pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 32. Breezy, with a north wind 13 to 23 mph, with gusts as high as 36 mph.
Monday
Mostly sunny, with a high near 51. North wind around 10 mph, with gusts as high as 17 mph.
Monday Night
Mostly cloudy, with a low around 34. East wind around 6 mph.
Tuesday
Mostly sunny, with a high near 60. South wind 6 to 8 mph.
Tuesday Night
Mostly cloudy, with a low around 42. South southeast wind 5 to 7 mph.
Wednesday
Mostly cloudy, with a high near 66.
Wednesday Night
Mostly cloudy, with a low around 51.
Thursday
Mostly sunny, with a high near 76.
Thursday Night
A chance of rain and thunderstorms. Partly cloudy, with a low around 38.
Friday
A chance of rain. Partly sunny, with a high near 51.
Friday Night
Mostly cloudy, with a low around 32.
Saturday
Mostly sunny, with a high near 53.
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ABOUT THIS FORECAST

 
Point Forecast:
Sullivan IL
 39.59°N 88.61°W (Elev. 669 ft)
1:26 pm CDT Mar 21, 2026
4pm CDT Mar 21, 2026-6pm CDT Mar 28, 2026
 
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Additional Resources

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Hourly Weather Forecast

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