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

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

79°F

26°C

Humidity 74%
Wind Speed Calm
Barometer 30.05 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 30 Jul 9:52 am CDT
Extended Forecast for

Du Quoin IL

  • Today

    Today: Mostly sunny, with a high near 89. East wind 3 to 5 mph.

    High: 89 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 66. Southeast wind 3 to 5 mph.

    Low: 66 °F

    Partly Cloudy

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 4pm. Partly sunny, with a high near 89. South wind 5 to 9 mph. Chance of precipitation is 40%.

    High: 89 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7pm. Low around 69. South southeast wind around 7 mph. Chance of precipitation is 90%.

    Low: 69 °F

    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms before 1pm, then showers likely between 1pm and 4pm, then showers likely and possibly a thunderstorm after 4pm. Mostly cloudy, with a high near 82. West southwest wind 8 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    High: 82 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly cloudy, with a low around 66. North wind 10 to 14 mph, with gusts as high as 18 mph. Chance of precipitation is 30%.

    Low: 66 °F

    Chance
    Showers

  • Sunday

    Sunday: A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 84. North northeast wind 11 to 14 mph, with gusts as high as 20 mph.

    High: 84 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 66. North wind 5 to 10 mph.

    Low: 66 °F

    Mostly Clear

  • Monday

    Monday: A slight chance of showers after 1pm. Mostly sunny, with a high near 87. Northeast wind 3 to 7 mph.

    High: 87 °F

    Sunny then
    Slight Chance
    Showers

Detailed Forecast

Today
Mostly sunny, with a high near 89. East wind 3 to 5 mph.
Tonight
Partly cloudy, with a low around 66. Southeast wind 3 to 5 mph.
Friday
A chance of showers, with thunderstorms also possible after 4pm. Partly sunny, with a high near 89. South wind 5 to 9 mph. Chance of precipitation is 40%.
Friday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7pm. Low around 69. South southeast wind around 7 mph. Chance of precipitation is 90%.
Saturday
A chance of showers and thunderstorms before 1pm, then showers likely between 1pm and 4pm, then showers likely and possibly a thunderstorm after 4pm. Mostly cloudy, with a high near 82. West southwest wind 8 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Saturday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly cloudy, with a low around 66. North wind 10 to 14 mph, with gusts as high as 18 mph. Chance of precipitation is 30%.
Sunday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 84. North northeast wind 11 to 14 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 66. North wind 5 to 10 mph.
Monday
A slight chance of showers after 1pm. Mostly sunny, with a high near 87. Northeast wind 3 to 7 mph.
Monday Night
Mostly clear, with a low around 67. Northeast wind around 5 mph becoming calm in the evening.
Tuesday
A chance of showers and thunderstorms. Sunny, with a high near 89. Light northeast wind.
Tuesday Night
Partly cloudy, with a low around 69. Calm wind.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 91. Light and variable wind.
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ABOUT THIS FORECAST

 
Point Forecast:
Du Quoin IL
 38.01°N 89.24°W
Last Update:
5:51 am CDT Jul 30, 2026
Forecast Valid:
10am CDT Jul 30, 2026-6pm CDT Aug 5, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation