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

63°F

17°C

Humidity 83%
Wind Speed Calm
Barometer 30.15 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 3 Oct 7:52 pm CDT
Extended Forecast for

Carbondale/Murphysboro, Southern Illinois Airport IL

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 50. Calm wind.

    Low: 50 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Sunday

    Sunday: Sunny, with a high near 78. Calm wind becoming north 5 to 8 mph in the morning.

    High: 78 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 51. North wind 3 to 5 mph.

    Low: 51 °F

    Mostly Clear

  • Monday

    Monday: Mostly cloudy through mid morning, then gradual clearing, with a high near 74. Northeast wind 5 to 10 mph.

    High: 74 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 47. Northeast wind around 5 mph becoming calm in the evening.

    Low: 47 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 75. Calm wind becoming east around 5 mph.

    High: 75 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 48. Calm wind.

    Low: 48 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 82. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 82 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 51. Calm wind.

    Low: 51 °F

    Clear

Detailed Forecast

Tonight
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 50. Calm wind.
Sunday
Sunny, with a high near 78. Calm wind becoming north 5 to 8 mph in the morning.
Sunday Night
Mostly clear, with a low around 51. North wind 3 to 5 mph.
Monday
Mostly cloudy through mid morning, then gradual clearing, with a high near 74. Northeast wind 5 to 10 mph.
Monday Night
Clear, with a low around 47. Northeast wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 75. Calm wind becoming east around 5 mph.
Tuesday Night
Clear, with a low around 48. Calm wind.
Wednesday
Sunny, with a high near 82. Calm wind becoming west southwest around 5 mph in the afternoon.
Wednesday Night
Clear, with a low around 51. Calm wind.
Thursday
Sunny, with a high near 82. Light north wind.
Thursday Night
Clear, with a low around 52. Calm wind.
Friday
Sunny, with a high near 83. Calm wind becoming south around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 55. Calm wind.
Saturday
Sunny, with a high near 84. Calm wind becoming south southeast 5 to 7 mph in the morning.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Carbondale/Murphysboro, Southern Illinois Airport IL
 37.79°N 89.25°W
Last Update:
7:51 pm CDT Oct 3, 2026
Forecast Valid:
8pm CDT Oct 3, 2026-6pm CDT Oct 10, 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