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

51°F

11°C

Humidity 74%
Wind Speed SW 7 mph
Barometer 30.05 in (1017.5 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 10 Nov 2:53 am CST
Extended Forecast for

Sullivan IL

  • Overnight

    Overnight: Clear, with a low around 46. West southwest wind around 7 mph, with gusts as high as 15 mph.

    Low: 46 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 68. West wind 5 to 7 mph becoming north northwest in the afternoon.

    High: 68 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 42. North wind around 5 mph becoming calm in the evening.

    Low: 42 °F

    Increasing
    Clouds

  • Veterans Day

    Veterans Day: Mostly sunny, with a high near 66. South wind 5 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph.

    High: 66 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 37. North northwest wind 11 to 13 mph, with gusts as high as 23 mph.

    Low: 37 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 48. North northwest wind 11 to 15 mph, with gusts as high as 22 mph.

    High: 48 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 28. North northwest wind 8 to 11 mph, with gusts as high as 17 mph.

    Low: 28 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 44.

    High: 44 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 23.

    Low: 23 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 46. West southwest wind around 7 mph, with gusts as high as 15 mph.
Tuesday
Sunny, with a high near 68. West wind 5 to 7 mph becoming north northwest in the afternoon.
Tuesday Night
Increasing clouds, with a low around 42. North wind around 5 mph becoming calm in the evening.
Veterans Day
Mostly sunny, with a high near 66. South wind 5 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph.
Wednesday Night
Partly cloudy, with a low around 37. North northwest wind 11 to 13 mph, with gusts as high as 23 mph.
Thursday
Partly sunny, with a high near 48. North northwest wind 11 to 15 mph, with gusts as high as 22 mph.
Thursday Night
Partly cloudy, with a low around 28. North northwest wind 8 to 11 mph, with gusts as high as 17 mph.
Friday
Mostly sunny, with a high near 44.
Friday Night
Mostly clear, with a low around 23.
Saturday
Sunny, with a high near 47.
Saturday Night
Mostly clear, with a low around 27.
Sunday
Mostly sunny, with a high near 51.
Sunday Night
Partly cloudy, with a low around 31.
Monday
Mostly sunny, with a high near 54.
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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:
2:11 am CST Nov 10, 2026
Forecast Valid:
3am CST Nov 10, 2026-6pm CST Nov 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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Chance of Precipitation