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

78°F

26°C

Humidity 48%
Wind Speed NA
Barometer 30.14 in (1020.0 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 7 Sep 10:53 am CDT
Extended Forecast for

3 Miles NNE Sullivan IL

  • Labor Day

    Labor Day: Sunny, with a high near 83. East wind around 9 mph.

    High: 83 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 60. East northeast wind 5 to 7 mph.

    Low: 60 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 92. East southeast wind 5 to 8 mph becoming south in the afternoon.

    High: 92 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 71. South southeast wind 5 to 11 mph, with gusts as high as 18 mph.

    Low: 71 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 95. West southwest wind 11 to 14 mph, with gusts as high as 21 mph.

    High: 95 °F

    Hot

  • Wednesday Night

    Wednesday Night: Showers likely, then showers and possibly a thunderstorm after 7pm. Low around 66. West wind 3 to 7 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 66 °F

    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 82. North northwest wind 5 to 7 mph.

    High: 82 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

Detailed Forecast

Labor Day
Sunny, with a high near 83. East wind around 9 mph.
Tonight
Mostly clear, with a low around 60. East northeast wind 5 to 7 mph.
Tuesday
Mostly sunny, with a high near 92. East southeast wind 5 to 8 mph becoming south in the afternoon.
Tuesday Night
Partly cloudy, with a low around 71. South southeast wind 5 to 11 mph, with gusts as high as 18 mph.
Wednesday
Mostly sunny and hot, with a high near 95. West southwest wind 11 to 14 mph, with gusts as high as 21 mph.
Wednesday Night
Showers likely, then showers and possibly a thunderstorm after 7pm. Low around 66. West wind 3 to 7 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
Mostly sunny, with a high near 82. North northwest wind 5 to 7 mph.
Thursday Night
Mostly clear, with a low around 57.
Friday
Sunny, with a high near 84.
Friday Night
A 30 percent chance of showers after 1am. Mostly clear, with a low around 62.
Saturday
Mostly sunny, with a high near 89.
Saturday Night
Mostly clear, with a low around 64.
Sunday
Sunny, with a high near 88.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE Sullivan IL
 39.63°N 88.58°W (Elev. 650 ft)
Last Update:
10:36 am CDT Sep 7, 2026
Forecast Valid:
11am CDT Sep 7, 2026-6pm CDT Sep 13, 2026
 
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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