National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

Fair

50°F

10°C

Humidity 44%
Wind Speed S 13 mph
Barometer 30.11 in (1019.6 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 13 Nov 11:53 pm CST
Extended Forecast for

Sullivan IL

  • Overnight

    Overnight: Partly cloudy, with a low around 41. South wind around 8 mph.

    Low: 41 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 71. South southwest wind 7 to 9 mph, with gusts as high as 16 mph.

    High: 71 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 56. South southwest wind 7 to 10 mph, with gusts as high as 16 mph.

    Low: 56 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 73. South southwest wind 10 to 15 mph becoming west in the afternoon. Winds could gust as high as 25 mph.

    High: 73 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 38. North northwest wind 8 to 10 mph, with gusts as high as 16 mph.

    Low: 38 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 55. North northwest wind 6 to 9 mph, with gusts as high as 15 mph.

    High: 55 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 33. West northwest wind around 5 mph becoming calm in the evening.

    Low: 33 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 55.

    High: 55 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Rain likely. Mostly cloudy, with a low around 39. Chance of precipitation is 60%.

    Low: 39 °F

    Rain Likely

Detailed Forecast

Overnight
Partly cloudy, with a low around 41. South wind around 8 mph.
Friday
Mostly sunny, with a high near 71. South southwest wind 7 to 9 mph, with gusts as high as 16 mph.
Friday Night
Partly cloudy, with a low around 56. South southwest wind 7 to 10 mph, with gusts as high as 16 mph.
Saturday
Partly sunny, with a high near 73. South southwest wind 10 to 15 mph becoming west in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
Mostly clear, with a low around 38. North northwest wind 8 to 10 mph, with gusts as high as 16 mph.
Sunday
Sunny, with a high near 55. North northwest wind 6 to 9 mph, with gusts as high as 15 mph.
Sunday Night
Mostly clear, with a low around 33. West northwest wind around 5 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 55.
Monday Night
Rain likely. Mostly cloudy, with a low around 39. Chance of precipitation is 60%.
Tuesday
A 30 percent chance of rain before noon. Partly sunny, with a high near 55.
Tuesday Night
Mostly cloudy, with a low around 37.
Wednesday
A chance of rain. Mostly cloudy, with a high near 55.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 43.
Thursday
Rain likely. The rain could be heavy at times. Mostly cloudy, with a high near 57.
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:
12:35 am CST Nov 14, 2025
Forecast Valid:
12am CST Nov 14, 2025-6pm CST Nov 20, 2025
 
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