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 39%
Wind Speed S 18 G 29 mph
Barometer 29.90 in (1012.2 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 31 Mar 6:52 pm CDT
Extended Forecast for

Du Quoin IL

  • Tonight

    Tonight: A 20 percent chance of showers after 2am. Partly cloudy, with a low around 64. South southwest wind 8 to 14 mph, with gusts as high as 26 mph.

    Low: 64 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms, mainly between 9am and 4pm. Partly sunny, with a high near 82. South southwest wind 6 to 9 mph.

    High: 82 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 67. South southeast wind 8 to 14 mph, with gusts as high as 25 mph.

    Low: 67 °F

    Mostly Cloudy

  • Thursday

    Thursday: A slight chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 79. Breezy, with a south wind 17 to 23 mph, with gusts as high as 32 mph. Chance of precipitation is 60%.

    High: 79 °F

    Breezy.
    Slight Chance
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Low around 63. Breezy, with a south southwest wind 10 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 80%.

    Low: 63 °F

    Showers and
    Breezy

  • Friday

    Friday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 81. South wind 9 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.

    High: 81 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 58. South wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.

    Low: 58 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: Showers and possibly a thunderstorm. Mostly cloudy, with a high near 69. South southwest wind 14 to 16 mph becoming west northwest in the afternoon. Winds could gust as high as 23 mph.

    High: 69 °F

    Showers

  • Saturday Night

    Saturday Night: A chance of showers, mainly before 1am. Mostly cloudy, with a low around 39. Northwest wind 11 to 14 mph, with gusts as high as 22 mph.

    Low: 39 °F

    Chance
    Showers

Detailed Forecast

Tonight
A 20 percent chance of showers after 2am. Partly cloudy, with a low around 64. South southwest wind 8 to 14 mph, with gusts as high as 26 mph.
Wednesday
A 40 percent chance of showers and thunderstorms, mainly between 9am and 4pm. Partly sunny, with a high near 82. South southwest wind 6 to 9 mph.
Wednesday Night
Mostly cloudy, with a low around 67. South southeast wind 8 to 14 mph, with gusts as high as 25 mph.
Thursday
A slight chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 79. Breezy, with a south wind 17 to 23 mph, with gusts as high as 32 mph. Chance of precipitation is 60%.
Thursday Night
Showers and possibly a thunderstorm. Low around 63. Breezy, with a south southwest wind 10 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 80%.
Friday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 81. South wind 9 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 58. South wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.
Saturday
Showers and possibly a thunderstorm. Mostly cloudy, with a high near 69. South southwest wind 14 to 16 mph becoming west northwest in the afternoon. Winds could gust as high as 23 mph.
Saturday Night
A chance of showers, mainly before 1am. Mostly cloudy, with a low around 39. Northwest wind 11 to 14 mph, with gusts as high as 22 mph.
Sunday
Mostly sunny, with a high near 55. Northwest wind 13 to 15 mph, with gusts as high as 22 mph.
Sunday Night
Mostly clear, with a low around 35. North wind 5 to 10 mph.
Monday
Sunny, with a high near 62. Northeast wind 5 to 8 mph.
Monday Night
Mostly clear, with a low around 40. East southeast wind around 6 mph becoming south southwest after midnight.
Tuesday
Sunny, with a high near 68. South southwest wind 6 to 10 mph becoming northwest in the afternoon.
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ABOUT THIS FORECAST

 
Point Forecast:
Du Quoin IL
 38.01°N 89.24°W
Last Update:
6:26 pm CDT Mar 31, 2026
Forecast Valid:
6pm CDT Mar 31, 2026-6pm CDT Apr 7, 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