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

81°F

27°C

Humidity 45%
Wind Speed NW 9 mph
Barometer 30.09 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 23 Aug 10:52 am CDT
Extended Forecast for

Du Quoin IL

  • Today

    Today: Mostly sunny, with a high near 83. Northwest wind around 6 mph.

    High: 83 °F

    Mostly Sunny

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, partly cloudy, with a low around 58. Light north wind.

    Low: 58 °F

    Partly Cloudy
    then Patchy
    Fog

  • Monday

    Monday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 85. Calm wind.

    High: 85 °F

    Patchy Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 63. Calm wind.

    Low: 63 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 86. Light east southeast wind.

    High: 86 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 65. Light east wind.

    Low: 65 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 89. Light and variable wind.

    High: 89 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 67. Calm wind.

    Low: 67 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 89. Calm wind becoming northwest 5 to 8 mph in the morning.

    High: 89 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 83. Northwest wind around 6 mph.
Tonight
Patchy fog after 3am. Otherwise, partly cloudy, with a low around 58. Light north wind.
Monday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 85. Calm wind.
Monday Night
Mostly clear, with a low around 63. Calm wind.
Tuesday
Mostly sunny, with a high near 86. Light east southeast wind.
Tuesday Night
Partly cloudy, with a low around 65. Light east wind.
Wednesday
Mostly sunny, with a high near 89. Light and variable wind.
Wednesday Night
Mostly clear, with a low around 67. Calm wind.
Thursday
Sunny, with a high near 89. Calm wind becoming northwest 5 to 8 mph in the morning.
Thursday Night
Mostly clear, with a low around 66. North northwest wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 87. Calm wind becoming north northwest around 6 mph in the afternoon.
Friday Night
Mostly clear, with a low around 65. Light and variable wind.
Saturday
Mostly sunny, with a high near 88. Calm wind becoming west around 6 mph in the afternoon.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Du Quoin IL
 38.01°N 89.24°W
Last Update:
10:56 am CDT Aug 23, 2026
Forecast Valid:
11am CDT Aug 23, 2026-6pm CDT Aug 29, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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