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

40°F

4°C

Humidity 97%
Wind Speed Calm
Barometer 29.92 in (1013.4 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 11 Nov 4:53 am CST
Extended Forecast for

Sullivan IL

  • Veterans Day

    Veterans Day: A slight chance of showers and thunderstorms between 1pm and 5pm. Increasing clouds, with a high near 66. South wind 5 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 20%.

    High: 66 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: Mostly cloudy, with a low around 40. North northwest wind 9 to 16 mph, with gusts as high as 26 mph.

    Low: 40 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of showers after 10am. Mostly cloudy, with a high near 48. North northwest wind 11 to 17 mph, with gusts as high as 26 mph.

    High: 48 °F

    Slight Chance
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 30. North northwest wind 9 to 14 mph, with gusts as high as 22 mph.

    Low: 30 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 43. North northwest wind 8 to 11 mph, with gusts as high as 18 mph.

    High: 43 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 23. North northwest wind 3 to 6 mph.

    Low: 23 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 46. North northwest wind around 5 mph becoming calm in the afternoon.

    High: 46 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 23.

    Low: 23 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 49.

    High: 49 °F

    Sunny

Detailed Forecast

Veterans Day
A slight chance of showers and thunderstorms between 1pm and 5pm. Increasing clouds, with a high near 66. South wind 5 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 20%.
Tonight
Mostly cloudy, with a low around 40. North northwest wind 9 to 16 mph, with gusts as high as 26 mph.
Thursday
A 20 percent chance of showers after 10am. Mostly cloudy, with a high near 48. North northwest wind 11 to 17 mph, with gusts as high as 26 mph.
Thursday Night
Partly cloudy, with a low around 30. North northwest wind 9 to 14 mph, with gusts as high as 22 mph.
Friday
Sunny, with a high near 43. North northwest wind 8 to 11 mph, with gusts as high as 18 mph.
Friday Night
Mostly clear, with a low around 23. North northwest wind 3 to 6 mph.
Saturday
Sunny, with a high near 46. North northwest wind around 5 mph becoming calm in the afternoon.
Saturday Night
Clear, with a low around 23.
Sunday
Sunny, with a high near 49.
Sunday Night
Mostly clear, with a low around 26.
Monday
Sunny, with a high near 50.
Monday Night
Mostly clear, with a low around 26.
Tuesday
Sunny, with a high near 52.
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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:
5:16 am CST Nov 11, 2026
Forecast Valid:
5am CST Nov 11, 2026-6pm CST Nov 17, 2026
 
Forecast Discussion
 
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Additional Resources

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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