National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

82°F

28°C

Humidity 70%
Wind Speed SE 6 mph
Barometer 30.01 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 1 Sep 8:48 pm CDT
Extended Forecast for

Du Quoin IL

Extreme Heat Warning until September 5, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning until September 5, 08:00pm

    NOW until 8:00pm Sat

    Extreme Heat Warning

  • Tonight

    Low: 76 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 101. Heat index values as high as 107. Calm wind becoming south southwest 5 to 8 mph in the morning.

    High: 101 °F

    Hot

  • Wednesday Night

    Wednesday Night: Clear, with a low around 76. South wind around 6 mph becoming calm in the evening.

    Low: 76 °F

    Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 100. Heat index values as high as 108. Calm wind becoming southwest 5 to 8 mph in the morning.

    High: 100 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 76. South wind around 5 mph becoming calm in the evening.

    Low: 76 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 101. Light southwest wind.

    High: 101 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 75. Calm wind.

    Low: 75 °F

    Mostly Clear

  • Saturday

    Saturday: A slight chance of showers and thunderstorms. Sunny and hot, with a high near 100. Light west wind.

    High: 100 °F

    Slight Chance
    T-storms

Detailed Forecast

Tonight
Clear, with a low around 76. Light south wind.
Wednesday
Sunny and hot, with a high near 101. Heat index values as high as 107. Calm wind becoming south southwest 5 to 8 mph in the morning.
Wednesday Night
Clear, with a low around 76. South wind around 6 mph becoming calm in the evening.
Thursday
Sunny and hot, with a high near 100. Heat index values as high as 108. Calm wind becoming southwest 5 to 8 mph in the morning.
Thursday Night
Mostly clear, with a low around 76. South wind around 5 mph becoming calm in the evening.
Friday
Sunny and hot, with a high near 101. Light southwest wind.
Friday Night
Mostly clear, with a low around 75. Calm wind.
Saturday
A slight chance of showers and thunderstorms. Sunny and hot, with a high near 100. Light west wind.
Saturday Night
Partly cloudy, with a low around 72. Calm wind.
Sunday
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 96. Calm wind becoming north 5 to 7 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 70. Northeast wind around 5 mph becoming calm in the evening.
Labor Day
Sunny, with a high near 94. Calm wind becoming east southeast 5 to 7 mph in the morning.
Monday Night
Partly cloudy, with a low around 68. East wind around 6 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 93. Light and variable wind becoming south southwest 5 to 7 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Du Quoin IL
 37.99°N 89.22°W
Last Update:
9:11 pm CDT Sep 1, 2026
Forecast Valid:
11pm CDT Sep 1, 2026-6pm CDT Sep 8, 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