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.

Mostly Cloudy

14°F

-10°C

Humidity 84%
Wind Speed W 13 mph
Barometer 30.31 in (1027.6 mb)
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Wind Chill0°F (-18°C)
Last update 30 Dec 2:53 am CST
Extended Forecast for

Sullivan IL

  • Overnight

    Overnight: Partly cloudy, with a low around 13. Wind chill values between 2 and 7. West northwest wind around 11 mph, with gusts as high as 21 mph.

    Low: 13 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 29. Wind chill values between 1 and 11. West northwest wind 9 to 11 mph, with gusts as high as 21 mph.

    High: 29 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 26. West northwest wind 9 to 13 mph, with gusts as high as 23 mph.

    Low: 26 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 37. West wind 9 to 13 mph, with gusts as high as 21 mph.

    High: 37 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 18. West wind around 8 mph becoming north after midnight. Winds could gust as high as 15 mph.

    Low: 18 °F

    Mostly Cloudy

  • New Year's Day

    New Year's Day: Sunny, with a high near 30. North wind 5 to 7 mph becoming calm in the afternoon.

    High: 30 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 22. Calm wind.

    Low: 22 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 37.

    High: 37 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 22.

    Low: 22 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 13. Wind chill values between 2 and 7. West northwest wind around 11 mph, with gusts as high as 21 mph.
Tuesday
Increasing clouds, with a high near 29. Wind chill values between 1 and 11. West northwest wind 9 to 11 mph, with gusts as high as 21 mph.
Tuesday Night
Mostly cloudy, with a low around 26. West northwest wind 9 to 13 mph, with gusts as high as 23 mph.
Wednesday
Mostly cloudy, with a high near 37. West wind 9 to 13 mph, with gusts as high as 21 mph.
Wednesday Night
Mostly cloudy, with a low around 18. West wind around 8 mph becoming north after midnight. Winds could gust as high as 15 mph.
New Year's Day
Sunny, with a high near 30. North wind 5 to 7 mph becoming calm in the afternoon.
Thursday Night
Mostly cloudy, with a low around 22. Calm wind.
Friday
Mostly cloudy, with a high near 37.
Friday Night
Mostly cloudy, with a low around 22.
Saturday
Mostly sunny, with a high near 37.
Saturday Night
Partly cloudy, with a low around 22.
Sunday
Mostly sunny, with a high near 43.
Sunday Night
Partly cloudy, with a low around 27.
Monday
Mostly sunny, with a high near 43.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sullivan IL
 39.59°N 88.61°W (Elev. 669 ft)
Last Update:
1:11 am CST Dec 30, 2025
Forecast Valid:
3am CST Dec 30, 2025-6pm CST Jan 5, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation