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.

Overcast and Breezy

25°F

-4°C

Humidity 58%
Wind Speed W 21 G 33 mph
Barometer 29.98 in (1016.1 mb)
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill10°F (-12°C)
Last update 18 Jan 11:53 pm CST
Extended Forecast for

Sullivan IL

Cold Weather Advisory January 19, 03:00am until January 19, 12:00pm
Click here for hazard details and duration
Cold Weather Advisory

  • Overnight

    Overnight: A chance of snow between 1am and 3am. Patchy blowing snow between 1am and 2am. Mostly cloudy, with a low around 5. Wind chill values between -1 and -11. Blustery, with a west northwest wind 17 to 24 mph, with gusts as high as 41 mph. Chance of precipitation is 50%.

    Low: 5 °F

    Chance Snow
    and Patchy
    Blowing Snow

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 14. Wind chill values between -5 and -15. Blustery, with a west northwest wind 17 to 22 mph decreasing to 11 to 16 mph in the afternoon. Winds could gust as high as 34 mph.

    High: 14 °F

    Mostly Sunny
    and Blustery

  • Monday Night

    Monday Night: Increasing clouds, with a low around 7. Wind chill values between -3 and 2. West southwest wind 5 to 9 mph, with gusts as high as 15 mph.

    Low: 7 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 28. Wind chill values between -1 and 9. Southwest wind 6 to 10 mph, with gusts as high as 16 mph.

    High: 28 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 21. South wind 7 to 16 mph, with gusts as high as 25 mph.

    Low: 21 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 40. South southwest wind 9 to 16 mph becoming west in the afternoon. Winds could gust as high as 26 mph.

    High: 40 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 18. West northwest wind around 9 mph, with gusts as high as 16 mph.

    Low: 18 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 28.

    High: 28 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 16.

    Low: 16 °F

    Partly Cloudy

Detailed Forecast

Overnight
A chance of snow between 1am and 3am. Patchy blowing snow between 1am and 2am. Mostly cloudy, with a low around 5. Wind chill values between -1 and -11. Blustery, with a west northwest wind 17 to 24 mph, with gusts as high as 41 mph. Chance of precipitation is 50%.
M.L.King Day
Mostly sunny, with a high near 14. Wind chill values between -5 and -15. Blustery, with a west northwest wind 17 to 22 mph decreasing to 11 to 16 mph in the afternoon. Winds could gust as high as 34 mph.
Monday Night
Increasing clouds, with a low around 7. Wind chill values between -3 and 2. West southwest wind 5 to 9 mph, with gusts as high as 15 mph.
Tuesday
Mostly sunny, with a high near 28. Wind chill values between -1 and 9. Southwest wind 6 to 10 mph, with gusts as high as 16 mph.
Tuesday Night
Mostly cloudy, with a low around 21. South wind 7 to 16 mph, with gusts as high as 25 mph.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 40. South southwest wind 9 to 16 mph becoming west in the afternoon. Winds could gust as high as 26 mph.
Wednesday Night
Partly cloudy, with a low around 18. West northwest wind around 9 mph, with gusts as high as 16 mph.
Thursday
Mostly sunny, with a high near 28.
Thursday Night
Partly cloudy, with a low around 16.
Friday
Mostly cloudy, with a high near 30.
Friday Night
A chance of snow. Mostly cloudy, with a low around 11.
Saturday
A chance of snow. Mostly cloudy, with a high near 19.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 2.
Sunday
Partly sunny, with a high near 14.
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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:
11:41 pm CST Jan 18, 2026
Forecast Valid:
12am CST Jan 19, 2026-6pm CST Jan 25, 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