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Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

88°F

31°C

Humidity 43%
Wind Speed E 8 mph
Barometer 30.08 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index89°F (32°C)
Last update 14 Sep 3:52 pm CDT
Extended Forecast for

Carbondale IL

Heat Advisory September 15, 11:00am until September 16, 07:00pm
Click here for hazard details and duration
Heat Advisory

  • This Afternoon

    This Afternoon: Sunny, with a high near 87. East southeast wind around 7 mph.

    High: 87 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 70. East southeast wind around 6 mph.

    Low: 70 °F

    Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 97. Heat index values as high as 107. South southwest wind 5 to 8 mph.

    High: 97 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 73. Light south wind.

    Low: 73 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 97. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 97 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 74. Calm wind.

    Low: 74 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 97. Light and variable wind.

    High: 97 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 73. Calm wind.

    Low: 73 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 96. Calm wind becoming south around 5 mph in the afternoon.

    High: 96 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 87. East southeast wind around 7 mph.
Tonight
Clear, with a low around 70. East southeast wind around 6 mph.
Tuesday
Sunny and hot, with a high near 97. Heat index values as high as 107. South southwest wind 5 to 8 mph.
Tuesday Night
Mostly clear, with a low around 73. Light south wind.
Wednesday
Sunny and hot, with a high near 97. Calm wind becoming southwest around 6 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 74. Calm wind.
Thursday
Sunny and hot, with a high near 97. Light and variable wind.
Thursday Night
Mostly clear, with a low around 73. Calm wind.
Friday
Sunny, with a high near 96. Calm wind becoming south around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 71. Calm wind.
Saturday
Sunny, with a high near 95. Calm wind becoming south southwest 5 to 8 mph in the morning.
Saturday Night
Mostly clear, with a low around 71. Calm wind becoming south southwest around 5 mph after midnight.
Sunday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 91. South southwest wind 3 to 8 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Carbondale IL
 37.72°N 89.2°W
Last Update:
2:16 pm CDT Sep 14, 2026
Forecast Valid:
4pm CDT Sep 14, 2026-6pm CDT Sep 20, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation