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

30°F

-1°C

Humidity 82%
Wind Speed Calm
Barometer 30.32 in (1027.1 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Last update 11 Feb 11:52 pm CST
Extended Forecast for

Du Quoin IL

  • Overnight

    Overnight: Partly cloudy, with a low around 30. Calm wind.

    Low: 30 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 50. Calm wind becoming south southeast around 6 mph in the morning.

    High: 50 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 31. East southeast wind 3 to 5 mph.

    Low: 31 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 57. Calm wind becoming south around 6 mph.

    High: 57 °F

    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 36. Calm wind.

    Low: 36 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 40 percent chance of showers, mainly after noon. Cloudy, with a high near 53. Calm wind becoming southeast 5 to 7 mph in the morning.

    High: 53 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely, mainly before midnight. Cloudy, with a low around 44. East wind 6 to 8 mph. Chance of precipitation is 60%.

    Low: 44 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers before noon. Mostly sunny, with a high near 54. North northeast wind 7 to 10 mph.

    High: 54 °F

    Chance
    Showers then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 36. North wind around 6 mph becoming calm in the evening.

    Low: 36 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 30. Calm wind.
Thursday
Partly sunny, with a high near 50. Calm wind becoming south southeast around 6 mph in the morning.
Thursday Night
Partly cloudy, with a low around 31. East southeast wind 3 to 5 mph.
Friday
Sunny, with a high near 57. Calm wind becoming south around 6 mph.
Friday Night
Mostly cloudy, with a low around 36. Calm wind.
Saturday
A 40 percent chance of showers, mainly after noon. Cloudy, with a high near 53. Calm wind becoming southeast 5 to 7 mph in the morning.
Saturday Night
Showers likely, mainly before midnight. Cloudy, with a low around 44. East wind 6 to 8 mph. Chance of precipitation is 60%.
Sunday
A chance of showers before noon. Mostly sunny, with a high near 54. North northeast wind 7 to 10 mph.
Sunday Night
Mostly clear, with a low around 36. North wind around 6 mph becoming calm in the evening.
Washington's Birthday
Mostly sunny, with a high near 60. Light and variable wind becoming south southeast 5 to 8 mph in the morning.
Monday Night
Mostly cloudy, with a low around 44. South wind 6 to 8 mph.
Tuesday
Mostly cloudy, with a high near 64. South wind 8 to 15 mph, with gusts as high as 24 mph.
Tuesday Night
Mostly cloudy, with a low around 53. South southwest wind around 15 mph, with gusts as high as 25 mph.
Wednesday
A slight chance of showers. Partly sunny, with a high near 68. South southwest wind 11 to 15 mph, with gusts as high as 24 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:
10:31 pm CST Feb 11, 2026
Forecast Valid:
12am CST Feb 12, 2026-6pm CST Feb 18, 2026
 
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Additional Resources

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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