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.

Light Snow

15°F

-9°C

Humidity 67%
Wind Speed W 18 G 31 mph
Barometer 30.21 in (1024.1 mb)
Dewpoint 6°F (-14°C)
Visibility 9.00 mi
Wind Chill-2°F (-19°C)
Last update 17 Jan 6:53 pm CST
Extended Forecast for

Sullivan IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 10. Wind chill values between -3 and 2. West wind 9 to 14 mph, with gusts as high as 22 mph.

    Low: 10 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of flurries between noon and 3pm, then a chance of flurries with a slight chance of snow after 3pm. Partly sunny, with a high near 26. Wind chill values between -2 and 8. Southwest wind 8 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.

    High: 26 °F

    Partly Sunny
    then Slight
    Chance Snow

  • Sunday Night

    Sunday Night: A chance of flurries before 9pm. Cloudy, then gradually becoming partly cloudy, with a low around 6. Wind chill values between -1 and -11. Blustery, with a southwest wind 10 to 20 mph becoming west northwest after midnight. Winds could gust as high as 31 mph.

    Low: 6 °F

    Mostly Cloudy
    then Partly
    Cloudy and
    Blustery

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 15. Wind chill values between -3 and -13. Blustery, with a west northwest wind 10 to 20 mph, with gusts as high as 31 mph.

    High: 15 °F

    Sunny and
    Blustery then
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 6. West northwest wind 6 to 8 mph becoming southwest after midnight.

    Low: 6 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 29. South southwest wind 7 to 11 mph, with gusts as high as 18 mph.

    High: 29 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 22. South wind 9 to 15 mph, with gusts as high as 25 mph.

    Low: 22 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 37.

    High: 37 °F

    Mostly Sunny

  • Wednesday Night

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

    Low: 16 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 10. Wind chill values between -3 and 2. West wind 9 to 14 mph, with gusts as high as 22 mph.
Sunday
A chance of flurries between noon and 3pm, then a chance of flurries with a slight chance of snow after 3pm. Partly sunny, with a high near 26. Wind chill values between -2 and 8. Southwest wind 8 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Sunday Night
A chance of flurries before 9pm. Cloudy, then gradually becoming partly cloudy, with a low around 6. Wind chill values between -1 and -11. Blustery, with a southwest wind 10 to 20 mph becoming west northwest after midnight. Winds could gust as high as 31 mph.
M.L.King Day
Sunny, with a high near 15. Wind chill values between -3 and -13. Blustery, with a west northwest wind 10 to 20 mph, with gusts as high as 31 mph.
Monday Night
Mostly clear, with a low around 6. West northwest wind 6 to 8 mph becoming southwest after midnight.
Tuesday
Mostly sunny, with a high near 29. South southwest wind 7 to 11 mph, with gusts as high as 18 mph.
Tuesday Night
Mostly cloudy, with a low around 22. South wind 9 to 15 mph, with gusts as high as 25 mph.
Wednesday
Mostly sunny, with a high near 37.
Wednesday Night
Partly cloudy, with a low around 16.
Thursday
Sunny, with a high near 30.
Thursday Night
Partly cloudy, with a low around 18.
Friday
Partly sunny, with a high near 37.
Friday Night
A chance of snow. Mostly cloudy, with a low around 16.
Saturday
A chance of snow. Mostly cloudy, with a high near 25.
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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:
6:36 pm CST Jan 17, 2026
Forecast Valid:
7pm CST Jan 17, 2026-6pm CST Jan 24, 2026
 
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Chance of Precipitation