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 and Breezy

34°F

1°C

Humidity 52%
Wind Speed NW 22 G 33 mph
Barometer 30.13 in (1020.9 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 21 Jan 10:53 pm CST
Extended Forecast for

Sullivan IL

  • Tonight

    Tonight: Partly cloudy, with a low around 20. West northwest wind 13 to 18 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 36 mph.

    Low: 20 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 33. West wind 7 to 11 mph, with gusts as high as 18 mph.

    High: 33 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 2. Wind chill values between -3 and -13. West southwest wind 6 to 11 mph becoming north 12 to 17 mph after midnight. Winds could gust as high as 24 mph.

    Low: 2 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy and cold, with a high near 8. Wind chill values between -10 and -15. North wind 13 to 17 mph, with gusts as high as 24 mph.

    High: 8 °F

    Cold

  • Friday Night

    Friday Night: Mostly cloudy, with a low around -1. North northeast wind around 11 mph, with gusts as high as 18 mph.

    Low: -1 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 50 percent chance of snow after noon. Cloudy, with a high near 13. Northeast wind around 11 mph, with gusts as high as 18 mph.

    High: 13 °F

    Cloudy then
    Chance Snow

  • Saturday Night

    Saturday Night: Snow likely. Cloudy, with a low around 7. Northeast wind around 10 mph, with gusts as high as 17 mph. Chance of precipitation is 70%.

    Low: 7 °F

    Snow Likely

  • Sunday

    Sunday: Snow likely, mainly before noon. Mostly cloudy, with a high near 16. Chance of precipitation is 60%.

    High: 16 °F

    Snow Likely
    then Chance
    Snow

  • Sunday Night

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

    Low: -2 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 20. West northwest wind 13 to 18 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 36 mph.
Thursday
Mostly sunny, with a high near 33. West wind 7 to 11 mph, with gusts as high as 18 mph.
Thursday Night
Mostly cloudy, with a low around 2. Wind chill values between -3 and -13. West southwest wind 6 to 11 mph becoming north 12 to 17 mph after midnight. Winds could gust as high as 24 mph.
Friday
Mostly cloudy and cold, with a high near 8. Wind chill values between -10 and -15. North wind 13 to 17 mph, with gusts as high as 24 mph.
Friday Night
Mostly cloudy, with a low around -1. North northeast wind around 11 mph, with gusts as high as 18 mph.
Saturday
A 50 percent chance of snow after noon. Cloudy, with a high near 13. Northeast wind around 11 mph, with gusts as high as 18 mph.
Saturday Night
Snow likely. Cloudy, with a low around 7. Northeast wind around 10 mph, with gusts as high as 17 mph. Chance of precipitation is 70%.
Sunday
Snow likely, mainly before noon. Mostly cloudy, with a high near 16. Chance of precipitation is 60%.
Sunday Night
Mostly cloudy, with a low around -2.
Monday
Mostly sunny, with a high near 11.
Monday Night
Mostly clear, with a low around 0.
Tuesday
Mostly sunny, with a high near 22.
Tuesday Night
Mostly cloudy, with a low around 10.
Wednesday
Partly sunny, with a high near 22.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sullivan IL
 39.59°N 88.61°W (Elev. 669 ft)
Last Update:
11:36 pm CST Jan 21, 2026
Forecast Valid:
11pm CST Jan 21, 2026-6pm CST Jan 28, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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