Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

Overcast

21°F

-6°C

Humidity 92%
Wind Speed NW 17 mph
Barometer 30.01 in (1017.2 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill7°F (-14°C)
Last update 2 Dec 4:53 am CST
Extended Forecast for

Sullivan IL

  • Today

    Today: Mostly cloudy, with a high near 23. Northwest wind 5 to 7 mph becoming southwest in the afternoon.

    High: 23 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 15. Wind chill values between 5 and 10. South wind 5 to 9 mph, with gusts as high as 18 mph.

    Low: 15 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 34. South southwest wind 6 to 9 mph, with gusts as high as 16 mph.

    High: 34 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 5. Wind chill values between -5 and zero. West wind 6 to 10 mph becoming north northwest in the evening. Winds could gust as high as 15 mph.

    Low: 5 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 14. North northwest wind 5 to 8 mph becoming calm  in the afternoon.

    High: 14 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 1. Calm wind becoming south around 5 mph after midnight.

    Low: 1 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 28. South wind 5 to 7 mph.

    High: 28 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 16.

    Low: 16 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 29.

    High: 29 °F

    Partly Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 23. Northwest wind 5 to 7 mph becoming southwest in the afternoon.
Tonight
Mostly cloudy, with a low around 15. Wind chill values between 5 and 10. South wind 5 to 9 mph, with gusts as high as 18 mph.
Wednesday
Mostly cloudy, with a high near 34. South southwest wind 6 to 9 mph, with gusts as high as 16 mph.
Wednesday Night
Mostly cloudy, with a low around 5. Wind chill values between -5 and zero. West wind 6 to 10 mph becoming north northwest in the evening. Winds could gust as high as 15 mph.
Thursday
Sunny, with a high near 14. North northwest wind 5 to 8 mph becoming calm in the afternoon.
Thursday Night
Partly cloudy, with a low around 1. Calm wind becoming south around 5 mph after midnight.
Friday
Mostly sunny, with a high near 28. South wind 5 to 7 mph.
Friday Night
Mostly cloudy, with a low around 16.
Saturday
Partly sunny, with a high near 29.
Saturday Night
Mostly cloudy, with a low around 18.
Sunday
Mostly cloudy, with a high near 28.
Sunday Night
Mostly cloudy, with a low around 8.
Monday
Partly sunny, with a high near 29.
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ABOUT THIS FORECAST

 
Point Forecast:
Sullivan IL
 39.59°N 88.61°W (Elev. 669 ft)
3:44 am CST Dec 2, 2025
5am CST Dec 2, 2025-6pm CST Dec 8, 2025
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database