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.

Fog/Mist

34°F

1°C

Humidity 97%
Wind Speed S 12 mph
Barometer 29.95 in (1014.6 mb)
Dewpoint 33°F (1°C)
Visibility 4.00 mi
Wind Chill25°F (-4°C)
Last update 7 Dec 2:53 am CST
Extended Forecast for

Sullivan IL

Winter Weather Advisory until December 7, 06:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory until December 7, 06:00am

    NOW until 6:00am Sun

    Winter Weather Advisory

  • Overnight

    Low: 34 °F

    Slight Chance
    Rain and
    Areas Fog

  • Sunday

    Sunday: Areas of fog before 4pm. Otherwise, cloudy, with a high near 34. Light and variable wind becoming north 8 to 13 mph in the morning. Winds could gust as high as 24 mph.

    High: 34 °F

    Areas Fog

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 16. North wind 7 to 13 mph, with gusts as high as 21 mph.

    Low: 16 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 29. North northeast wind 5 to 7 mph becoming calm in the morning.

    High: 29 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 17. Light south wind becoming south southwest 9 to 14 mph in the evening. Winds could gust as high as 22 mph.

    Low: 17 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 43. South southwest wind around 14 mph, with gusts as high as 23 mph.

    High: 43 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 36. Southwest wind 13 to 18 mph, with gusts as high as 29 mph.

    Low: 36 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 42.

    High: 42 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of rain before 4am. Areas of fog. Otherwise, cloudy, with a steady temperature around 34. South wind around 7 mph.
Sunday
Areas of fog before 4pm. Otherwise, cloudy, with a high near 34. Light and variable wind becoming north 8 to 13 mph in the morning. Winds could gust as high as 24 mph.
Sunday Night
Mostly cloudy, with a low around 16. North wind 7 to 13 mph, with gusts as high as 21 mph.
Monday
Mostly sunny, with a high near 29. North northeast wind 5 to 7 mph becoming calm in the morning.
Monday Night
Partly cloudy, with a low around 17. Light south wind becoming south southwest 9 to 14 mph in the evening. Winds could gust as high as 22 mph.
Tuesday
Partly sunny, with a high near 43. South southwest wind around 14 mph, with gusts as high as 23 mph.
Tuesday Night
Mostly cloudy, with a low around 36. Southwest wind 13 to 18 mph, with gusts as high as 29 mph.
Wednesday
Mostly cloudy, with a high near 42.
Wednesday Night
Mostly cloudy, with a low around 23.
Thursday
A 30 percent chance of snow. Mostly cloudy, with a high near 31.
Thursday Night
Mostly cloudy, with a low around 12.
Friday
Partly sunny, with a high near 21.
Friday Night
Mostly cloudy, with a low around 2.
Saturday
Partly sunny, with a high near 15.
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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:
1:21 am CST Dec 7, 2025
Forecast Valid:
3am CST Dec 7, 2025-6pm CST Dec 13, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation