Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

Overcast

72°F

22°C

Humidity 71%
Wind Speed N 16 mph
Barometer 30.02 in (1016.1 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 7 Oct 12:53 pm CDT
Extended Forecast for

Sullivan IL

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms before 3pm.  Cloudy, with a high near 73. North wind 10 to 15 mph, with gusts as high as 24 mph.

    High: 73 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Cloudy during the early evening, then gradual clearing, with a low around 44. North wind 7 to 11 mph, with gusts as high as 18 mph.

    Low: 44 °F

    Gradual
    Clearing

  • Wednesday

    Wednesday: Sunny, with a high near 71. North northeast wind 7 to 10 mph, with gusts as high as 16 mph.

    High: 71 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 40. East northeast wind around 7 mph.

    Low: 40 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 70. East wind around 7 mph.

    High: 70 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 38. East wind around 5 mph becoming calm  in the evening.

    Low: 38 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 73. Light and variable wind.

    High: 73 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 48.

    Low: 48 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms before 3pm. Cloudy, with a high near 73. North wind 10 to 15 mph, with gusts as high as 24 mph.
Tonight
Cloudy during the early evening, then gradual clearing, with a low around 44. North wind 7 to 11 mph, with gusts as high as 18 mph.
Wednesday
Sunny, with a high near 71. North northeast wind 7 to 10 mph, with gusts as high as 16 mph.
Wednesday Night
Clear, with a low around 40. East northeast wind around 7 mph.
Thursday
Sunny, with a high near 70. East wind around 7 mph.
Thursday Night
Clear, with a low around 38. East wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 73. Light and variable wind.
Friday Night
Partly cloudy, with a low around 48.
Saturday
Mostly sunny, with a high near 77.
Saturday Night
Partly cloudy, with a low around 49.
Sunday
Sunny, with a high near 79.
Sunday Night
Partly cloudy, with a low around 53.
Columbus Day
Mostly sunny, with a high near 81.
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ABOUT THIS FORECAST

 
Point Forecast:
Sullivan IL
 39.61°N 88.61°W (Elev. 669 ft)
1:11 pm CDT Oct 7, 2025
1pm CDT Oct 7, 2025-6pm CDT Oct 13, 2025
 
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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