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.

Mostly Cloudy

76°F

24°C

Humidity 58%
Wind Speed SE 3 mph
Barometer 30.08 in (1018.3 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 24 Jul 5:53 pm CDT
Extended Forecast for

5 Miles SSW Sullivan IL

Heat Advisory July 26, 12:00pm until July 27, 09:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: Isolated showers after 7pm. Cloudy, with a low around 64. Calm wind. Chance of precipitation is 20%.

    Low: 64 °F

    Isolated
    Showers

  • Saturday

    Saturday: Isolated showers before 1pm. Mostly cloudy, with a high near 82. Calm wind becoming south around 6 mph in the morning. Chance of precipitation is 20%.

    High: 82 °F

    Isolated
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 68. Calm wind.

    Low: 68 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 90. Heat index values as high as 101. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 90 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 73. Calm wind becoming south southwest around 5 mph after midnight.

    Low: 73 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 94. Southwest wind 6 to 11 mph, with gusts as high as 21 mph.

    High: 94 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 74. Southwest wind 7 to 10 mph becoming west northwest after midnight. Winds could gust as high as 17 mph.

    Low: 74 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 69.

    Low: 69 °F

    Mostly Clear

Detailed Forecast

Tonight
Isolated showers after 7pm. Cloudy, with a low around 64. Calm wind. Chance of precipitation is 20%.
Saturday
Isolated showers before 1pm. Mostly cloudy, with a high near 82. Calm wind becoming south around 6 mph in the morning. Chance of precipitation is 20%.
Saturday Night
Partly cloudy, with a low around 68. Calm wind.
Sunday
Mostly sunny, with a high near 90. Heat index values as high as 101. Calm wind becoming west southwest around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 73. Calm wind becoming south southwest around 5 mph after midnight.
Monday
Mostly sunny, with a high near 94. Southwest wind 6 to 11 mph, with gusts as high as 21 mph.
Monday Night
Partly cloudy, with a low around 74. Southwest wind 7 to 10 mph becoming west northwest after midnight. Winds could gust as high as 17 mph.
Tuesday
Sunny, with a high near 93.
Tuesday Night
Mostly clear, with a low around 69.
Wednesday
Sunny, with a high near 90.
Wednesday Night
Mostly clear, with a low around 68.
Thursday
Mostly sunny, with a high near 90.
Thursday Night
Partly cloudy, with a low around 69.
Friday
Mostly sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Sullivan IL
 39.54°N 88.64°W (Elev. 600 ft)
Last Update:
5:36 pm CDT Jul 24, 2026
Forecast Valid:
6pm CDT Jul 24, 2026-6pm CDT Jul 31, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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