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

91°F

33°C

Humidity 56%
Wind Speed NA
Barometer 30.06 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index100°F (38°C)
Last update 14 Aug 1:52 pm CDT
Extended Forecast for

Du Quoin IL

Extreme Heat Warning August 14, 02:43pm until August 16, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 14, 02:43pm until August 16, 08:00pm

    NOW until 8:00pm Sun

    Extreme Heat Warning

  • This Afternoon

    High: 93 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 75. Light south southeast wind.

    Low: 75 °F

    Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 99. Heat index values as high as 111. Southwest wind 3 to 5 mph.

    High: 99 °F

    Hot

  • Saturday Night

    Saturday Night: Clear, with a low around 75. Calm wind becoming south around 5 mph in the evening.

    Low: 75 °F

    Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 99. West northwest wind 3 to 7 mph.

    High: 99 °F

    Hot

  • Sunday Night

    Sunday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 72. Light north northwest wind.

    Low: 72 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 89. North northwest wind 3 to 7 mph.

    High: 89 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 67. Light north northeast wind.

    Low: 67 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
Sunny, with a high near 93. Heat index values as high as 107. South wind around 8 mph.
Tonight
Clear, with a low around 75. Light south southeast wind.
Saturday
Sunny and hot, with a high near 99. Heat index values as high as 111. Southwest wind 3 to 5 mph.
Saturday Night
Clear, with a low around 75. Calm wind becoming south around 5 mph in the evening.
Sunday
Sunny and hot, with a high near 99. West northwest wind 3 to 7 mph.
Sunday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 72. Light north northwest wind.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 89. North northwest wind 3 to 7 mph.
Monday Night
Partly cloudy, with a low around 67. Light north northeast wind.
Tuesday
Mostly sunny, with a high near 90. Calm wind.
Tuesday Night
Mostly clear, with a low around 71. Calm wind becoming south around 5 mph after midnight.
Wednesday
Mostly sunny, with a high near 96. South wind 5 to 10 mph becoming west in the afternoon.
Wednesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 70. North wind 5 to 7 mph.
Thursday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 88. North wind 5 to 8 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Du Quoin IL
 38.01°N 89.24°W
Last Update:
1:26 pm CDT Aug 14, 2026
Forecast Valid:
2pm CDT Aug 14, 2026-6pm CDT Aug 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