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

47°F

8°C

Humidity 56%
Wind Speed N 5 mph
Barometer 30.24 in (1024.2 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 13 Nov 8:53 am CST
Extended Forecast for

Sullivan IL

  • Today

    Today: Mostly sunny, with a high near 62. Calm wind becoming south southeast around 6 mph in the afternoon.

    High: 62 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 42. South wind around 7 mph.

    Low: 42 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 70. South wind 6 to 9 mph.

    High: 70 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 54. South southwest wind 6 to 10 mph, with gusts as high as 16 mph.

    Low: 54 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 73. West southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 73 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 38. North northwest wind 8 to 10 mph, with gusts as high as 17 mph.

    Low: 38 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 55. Northwest wind 6 to 9 mph, with gusts as high as 16 mph.

    High: 55 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 33.

    Low: 33 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 55.

    High: 55 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 62. Calm wind becoming south southeast around 6 mph in the afternoon.
Tonight
Mostly clear, with a low around 42. South wind around 7 mph.
Friday
Mostly sunny, with a high near 70. South wind 6 to 9 mph.
Friday Night
Partly cloudy, with a low around 54. South southwest wind 6 to 10 mph, with gusts as high as 16 mph.
Saturday
Partly sunny, with a high near 73. West southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday Night
Partly cloudy, with a low around 38. North northwest wind 8 to 10 mph, with gusts as high as 17 mph.
Sunday
Sunny, with a high near 55. Northwest wind 6 to 9 mph, with gusts as high as 16 mph.
Sunday Night
Mostly clear, with a low around 33.
Monday
Mostly sunny, with a high near 55.
Monday Night
Rain likely, mainly after midnight. Mostly cloudy, with a low around 42. Chance of precipitation is 60%.
Tuesday
A chance of rain. Partly sunny, with a high near 56.
Tuesday Night
Mostly cloudy, with a low around 38.
Wednesday
Partly sunny, with a high near 55.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sullivan IL
 39.59°N 88.61°W (Elev. 669 ft)
Last Update:
8:37 am CST Nov 13, 2025
Forecast Valid:
9am CST Nov 13, 2025-6pm CST Nov 19, 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