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.

Overcast

68°F

20°C

Humidity 83%
Wind Speed NE 3 mph
Barometer 30.22 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 24 Sep 8:52 pm CDT
Extended Forecast for

Carbondale IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 59. Calm wind.

    Low: 59 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 79. Calm wind becoming northeast around 6 mph in the afternoon.

    High: 79 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 58. North northeast wind around 5 mph becoming calm in the evening.

    Low: 58 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 74. Light east northeast wind.

    High: 74 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 59. Calm wind.

    Low: 59 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 77. Light east northeast wind.

    High: 77 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 56. Calm wind.

    Low: 56 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 79. Calm wind.

    High: 79 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 59. Calm wind.

    Low: 59 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 59. Calm wind.
Friday
Partly sunny, with a high near 79. Calm wind becoming northeast around 6 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 58. North northeast wind around 5 mph becoming calm in the evening.
Saturday
Mostly cloudy, with a high near 74. Light east northeast wind.
Saturday Night
Mostly cloudy, with a low around 59. Calm wind.
Sunday
Partly sunny, with a high near 77. Light east northeast wind.
Sunday Night
Partly cloudy, with a low around 56. Calm wind.
Monday
Sunny, with a high near 79. Calm wind.
Monday Night
Mostly clear, with a low around 59. Calm wind.
Tuesday
Mostly sunny, with a high near 83. Calm wind becoming south 5 to 9 mph in the morning.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 67. South southeast wind 6 to 11 mph.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 82. Southwest wind 13 to 15 mph, with gusts as high as 22 mph.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 65. South wind around 6 mph.
Thursday
A chance of showers. Partly sunny, with a high near 79. Southwest wind 6 to 9 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Carbondale IL
 37.72°N 89.2°W
Last Update:
7:46 pm CDT Sep 24, 2026
Forecast Valid:
9pm CDT Sep 24, 2026-6pm CDT Oct 1, 2026
 
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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