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

Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Overcast

79°F

26°C

Humidity 79%
Wind Speed SE 5 mph
Barometer 29.90 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 11 Sep 2:55 pm CDT
Extended Forecast for

Carbondale/Murphysboro, Southern Illinois Airport IL

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 83. South southeast wind around 5 mph.

    High: 83 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms before 1am, then a slight chance of showers between 1am and 4am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 67. Calm wind. Chance of precipitation is 30%.

    Low: 67 °F

    Chance
    T-storms and
    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 90. Light and variable wind.

    High: 90 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 67. Calm wind.

    Low: 67 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 91. Light and variable wind.

    High: 91 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 66. Light northeast wind.

    Low: 66 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 89. East southeast wind 5 to 7 mph.

    High: 89 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 68. East southeast wind 3 to 5 mph.

    Low: 68 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93. South southwest wind 3 to 8 mph.

    High: 93 °F

    Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 83. South southeast wind around 5 mph.
Tonight
A chance of showers and thunderstorms before 1am, then a slight chance of showers between 1am and 4am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 67. Calm wind. Chance of precipitation is 30%.
Saturday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 90. Light and variable wind.
Saturday Night
Partly cloudy, with a low around 67. Calm wind.
Sunday
Mostly sunny, with a high near 91. Light and variable wind.
Sunday Night
Partly cloudy, with a low around 66. Light northeast wind.
Monday
Sunny, with a high near 89. East southeast wind 5 to 7 mph.
Monday Night
Mostly clear, with a low around 68. East southeast wind 3 to 5 mph.
Tuesday
Sunny, with a high near 93. South southwest wind 3 to 8 mph.
Tuesday Night
Mostly clear, with a low around 71. Light south wind.
Wednesday
Sunny, with a high near 94. South southwest wind 3 to 6 mph.
Wednesday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 71. Calm wind.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 90. Light and variable wind becoming west 5 to 7 mph in the morning.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Carbondale/Murphysboro, Southern Illinois Airport IL
 37.77°N 89.26°W
Last Update:
2:01 pm CDT Sep 11, 2026
Forecast Valid:
3pm CDT Sep 11, 2026-6pm CDT Sep 17, 2026
 
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