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

59°F

15°C

Humidity 64%
Wind Speed S 10 mph
Barometer 29.99 in (1015.2 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 20 Mar 2:52 am CDT
Extended Forecast for

Carbondale IL

  • Overnight

    Overnight: Mostly clear, with a steady temperature around 57. South southwest wind around 9 mph.

    Low: 57 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 82. West southwest wind 8 to 10 mph.

    High: 82 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 53. South southwest wind around 6 mph becoming calm after midnight.

    Low: 53 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 80. Calm wind becoming west southwest around 6 mph in the afternoon.

    High: 80 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 60. Calm wind becoming south southwest 5 to 7 mph in the evening.

    Low: 60 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 85. South southwest wind 9 to 15 mph, with gusts as high as 23 mph.

    High: 85 °F

    Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers before 1am. Partly cloudy, with a low around 44. Southwest wind around 14 mph becoming north after midnight. Winds could gust as high as 23 mph.

    Low: 44 °F

    Slight Chance
    Showers

  • Monday

    Monday: Sunny, with a high near 60. North wind 10 to 13 mph, with gusts as high as 21 mph.

    High: 60 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 41. East northeast wind 3 to 6 mph.

    Low: 41 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a steady temperature around 57. South southwest wind around 9 mph.
Friday
Sunny, with a high near 82. West southwest wind 8 to 10 mph.
Friday Night
Partly cloudy, with a low around 53. South southwest wind around 6 mph becoming calm after midnight.
Saturday
Sunny, with a high near 80. Calm wind becoming west southwest around 6 mph in the afternoon.
Saturday Night
Clear, with a low around 60. Calm wind becoming south southwest 5 to 7 mph in the evening.
Sunday
Sunny, with a high near 85. South southwest wind 9 to 15 mph, with gusts as high as 23 mph.
Sunday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 44. Southwest wind around 14 mph becoming north after midnight. Winds could gust as high as 23 mph.
Monday
Sunny, with a high near 60. North wind 10 to 13 mph, with gusts as high as 21 mph.
Monday Night
Partly cloudy, with a low around 41. East northeast wind 3 to 6 mph.
Tuesday
Partly sunny, with a high near 61. East southeast wind around 6 mph.
Tuesday Night
Mostly cloudy, with a low around 44. East southeast wind 3 to 5 mph.
Wednesday
Partly sunny, with a high near 67. East wind 6 to 9 mph.
Wednesday Night
Partly cloudy, with a low around 51. South southeast wind around 9 mph.
Thursday
Sunny, with a high near 78. South southwest wind 9 to 15 mph, with gusts as high as 22 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Carbondale IL
 37.72°N 89.23°W
Last Update:
1:26 am CDT Mar 20, 2026
Forecast Valid:
3am CDT Mar 20, 2026-6pm CDT Mar 26, 2026
 
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Additional Resources

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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