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.

Fair

16°F

-9°C

Humidity 62%
Wind Speed N 12 mph
Barometer 30.33 in (1028.8 mb)
Dewpoint 5°F (-15°C)
Visibility 10.00 mi
Wind Chill3°F (-16°C)
Last update 30 Jan 2:53 pm CST
Extended Forecast for

Sullivan IL

  • This Afternoon

    This Afternoon: A chance of flurries. Partly sunny, with a high near 15. Wind chill values between zero and 5. North wind around 10 mph.

    High: 15 °F

    Chance
    Flurries

  • Tonight

    Tonight: A chance of flurries before midnight. Mostly cloudy, with a low around 1. Wind chill values between -4 and -14. North wind 8 to 11 mph, with gusts as high as 21 mph.

    Low: 1 °F

    Chance
    Flurries

  • Saturday

    Saturday: Partly sunny, with a high near 18. Wind chill values between -2 and -12. Northwest wind 8 to 13 mph, with gusts as high as 21 mph.

    High: 18 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around -1. Wind chill values between -3 and -8. Northwest wind 3 to 7 mph.

    Low: -1 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 22. Light and variable wind becoming south southwest 5 to 7 mph in the morning.

    High: 22 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 13. South wind around 7 mph.

    Low: 13 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 29. West wind 5 to 7 mph.

    High: 29 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 17.

    Low: 17 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 40 percent chance of snow after noon. Mostly cloudy, with a high near 31.

    High: 31 °F

    Cloudy then
    Chance Snow

Detailed Forecast

This Afternoon
A chance of flurries. Partly sunny, with a high near 15. Wind chill values between zero and 5. North wind around 10 mph.
Tonight
A chance of flurries before midnight. Mostly cloudy, with a low around 1. Wind chill values between -4 and -14. North wind 8 to 11 mph, with gusts as high as 21 mph.
Saturday
Partly sunny, with a high near 18. Wind chill values between -2 and -12. Northwest wind 8 to 13 mph, with gusts as high as 21 mph.
Saturday Night
Mostly clear, with a low around -1. Wind chill values between -3 and -8. Northwest wind 3 to 7 mph.
Sunday
Sunny, with a high near 22. Light and variable wind becoming south southwest 5 to 7 mph in the morning.
Sunday Night
Mostly cloudy, with a low around 13. South wind around 7 mph.
Monday
Mostly cloudy, with a high near 29. West wind 5 to 7 mph.
Monday Night
Mostly cloudy, with a low around 17.
Tuesday
A 40 percent chance of snow after noon. Mostly cloudy, with a high near 31.
Tuesday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 22.
Wednesday
Mostly cloudy, with a high near 28.
Wednesday Night
Mostly cloudy, with a low around 15.
Thursday
Partly sunny, with a high near 27.
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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:
8:38 am CST Jan 30, 2026
Forecast Valid:
3pm CST Jan 30, 2026-6pm CST Feb 5, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation