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

67°F

19°C

Humidity 63%
Wind Speed S 9 mph
Barometer 29.97 in (1014.6 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 31 Mar 11:52 pm CDT
Extended Forecast for

Du Quoin IL

  • Overnight

    Overnight: A 20 percent chance of showers after 2am. Partly cloudy, with a low around 64. South southwest wind around 9 mph, with gusts as high as 20 mph.

    Low: 64 °F

    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

Overnight
A 20 percent chance of showers after 2am. Partly cloudy, with a low around 64. South southwest wind around 9 mph, with gusts as high as 20 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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Forecast Area
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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:
12am CDT Apr 1, 2026-6pm CDT Apr 7, 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