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

42°F

6°C

Humidity 96%
Wind Speed W 10 mph
Barometer 30.16 in (1021.5 mb)
Dewpoint 41°F (5°C)
Visibility 2.00 mi
Wind Chill36°F (2°C)
Last update 23 Nov 6:53 am CST
Extended Forecast for

Sullivan IL

Dense Fog Advisory until November 23, 10:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory until November 23, 10:00am

    NOW until 10:00am Sun

    Dense Fog Advisory

  • Today

    High: 54 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 36. Calm wind becoming south southeast around 6 mph after midnight.

    Low: 36 °F

    Partly Cloudy

  • Monday

    Monday: A 20 percent chance of rain after noon. Mostly cloudy, with a high near 55. South southeast wind 6 to 9 mph, with gusts as high as 15 mph.

    High: 55 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Monday Night

    Monday Night: Rain. Low around 46. South southeast wind 3 to 7 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 46 °F

    Rain

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 59. West southwest wind 3 to 7 mph.

    High: 59 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 33. West southwest wind 6 to 14 mph, with gusts as high as 21 mph.

    Low: 33 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 42. West wind 10 to 16 mph, with gusts as high as 25 mph.

    High: 42 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 23.

    Low: 23 °F

    Partly Cloudy

Detailed Forecast

Today
Patchy fog before 9am. Otherwise, sunny, with a high near 54. Northwest wind around 6 mph becoming calm in the morning.
Tonight
Partly cloudy, with a low around 36. Calm wind becoming south southeast around 6 mph after midnight.
Monday
A 20 percent chance of rain after noon. Mostly cloudy, with a high near 55. South southeast wind 6 to 9 mph, with gusts as high as 15 mph.
Monday Night
Rain. Low around 46. South southeast wind 3 to 7 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday
Mostly cloudy, with a high near 59. West southwest wind 3 to 7 mph.
Tuesday Night
Mostly cloudy, with a low around 33. West southwest wind 6 to 14 mph, with gusts as high as 21 mph.
Wednesday
Mostly sunny, with a high near 42. West wind 10 to 16 mph, with gusts as high as 25 mph.
Wednesday Night
Partly cloudy, with a low around 23.
Thanksgiving Day
Sunny, with a high near 38.
Thursday Night
Partly cloudy, with a low around 20.
Friday
Partly sunny, with a high near 39.
Friday Night
Mostly cloudy, with a low around 26.
Saturday
A chance of rain. Mostly cloudy, with a high near 43.
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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:
7:16 am CST Nov 23, 2025
Forecast Valid:
7am CST Nov 23, 2025-6pm CST Nov 29, 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