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

22°F

-6°C

Humidity 55%
Wind Speed SW 5 mph
Barometer 30.31 in (1027.4 mb)
Dewpoint 8°F (-13°C)
Visibility 10.00 mi
Wind Chill15°F (-9°C)
Last update 22 Jan 8:53 am CST
Extended Forecast for

Sullivan IL

Cold Weather Advisory January 23, 03:00am until January 24, 12:00pm
Click here for hazard details and duration
Cold Weather Advisory

  • Today

    Today: Partly sunny, with a high near 33. West wind 8 to 11 mph, with gusts as high as 18 mph.

    High: 33 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 1. Wind chill values between -5 and -10. West southwest wind 6 to 16 mph becoming north northwest in the evening. Winds could gust as high as 25 mph.

    Low: 1 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny and cold, with a high near 8. Wind chill values between -9 and -17. North wind 11 to 16 mph, with gusts as high as 24 mph.

    High: 8 °F

    Cold

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 0. Wind chill values between -9 and -14. Northeast wind around 10 mph, with gusts as high as 17 mph.

    Low: 0 °F

    Mostly Cloudy

  • Saturday

    Saturday: Snow likely after noon. Cloudy, with a high near 11. East northeast wind around 10 mph, with gusts as high as 17 mph. Chance of precipitation is 60%. New snow accumulation of around an inch possible.

    High: 11 °F

    Cloudy then
    Snow Likely

  • Saturday Night

    Saturday Night: Snow. Low around 7. North northeast wind around 10 mph, with gusts as high as 16 mph. Chance of precipitation is 80%.

    Low: 7 °F

    Snow

  • Sunday

    Sunday: A 40 percent chance of snow. Mostly cloudy, with a high near 15. North wind around 10 mph, with gusts as high as 17 mph.

    High: 15 °F

    Chance Snow

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around -2.

    Low: -2 °F

    Mostly Cloudy

  • Monday

    Monday: Sunny, with a high near 13.

    High: 13 °F

    Sunny

Detailed Forecast

Today
Partly sunny, with a high near 33. West wind 8 to 11 mph, with gusts as high as 18 mph.
Tonight
Mostly cloudy, with a low around 1. Wind chill values between -5 and -10. West southwest wind 6 to 16 mph becoming north northwest in the evening. Winds could gust as high as 25 mph.
Friday
Partly sunny and cold, with a high near 8. Wind chill values between -9 and -17. North wind 11 to 16 mph, with gusts as high as 24 mph.
Friday Night
Mostly cloudy, with a low around 0. Wind chill values between -9 and -14. Northeast wind around 10 mph, with gusts as high as 17 mph.
Saturday
Snow likely after noon. Cloudy, with a high near 11. East northeast wind around 10 mph, with gusts as high as 17 mph. Chance of precipitation is 60%. New snow accumulation of around an inch possible.
Saturday Night
Snow. Low around 7. North northeast wind around 10 mph, with gusts as high as 16 mph. Chance of precipitation is 80%.
Sunday
A 40 percent chance of snow. Mostly cloudy, with a high near 15. North wind around 10 mph, with gusts as high as 17 mph.
Sunday Night
Mostly cloudy, with a low around -2.
Monday
Sunny, with a high near 13.
Monday Night
Mostly clear, with a low around 5.
Tuesday
Mostly sunny, with a high near 25.
Tuesday Night
Mostly cloudy, with a low around 12.
Wednesday
Partly sunny, with a high near 23.
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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:
8:36 am CST Jan 22, 2026
Forecast Valid:
9am CST Jan 22, 2026-6pm CST Jan 28, 2026
 
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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