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

44°F

7°C

Humidity 79%
Wind Speed Calm
Barometer 30.31 in (1026.5 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 6 Apr 7:52 am CDT
Extended Forecast for

Carbondale IL

  • Today

    Today: Sunny, with a high near 66. Light and variable wind becoming northwest 5 to 10 mph in the morning.

    High: 66 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 41. North northeast wind 5 to 7 mph.

    Low: 41 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 58. East northeast wind 8 to 10 mph.

    High: 58 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 40. East southeast wind around 7 mph.

    Low: 40 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 74. South wind 6 to 10 mph, with gusts as high as 18 mph.

    High: 74 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 53. South southeast wind around 9 mph, with gusts as high as 18 mph.

    Low: 53 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 72. South wind 9 to 11 mph, with gusts as high as 20 mph.

    High: 72 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 58. South wind around 6 mph.

    Low: 58 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Friday

    Friday: A chance of showers and thunderstorms. Partly sunny, with a high near 77. South southwest wind 6 to 8 mph.

    High: 77 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 66. Light and variable wind becoming northwest 5 to 10 mph in the morning.
Tonight
Mostly clear, with a low around 41. North northeast wind 5 to 7 mph.
Tuesday
Partly sunny, with a high near 58. East northeast wind 8 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 40. East southeast wind around 7 mph.
Wednesday
Partly sunny, with a high near 74. South wind 6 to 10 mph, with gusts as high as 18 mph.
Wednesday Night
Partly cloudy, with a low around 53. South southeast wind around 9 mph, with gusts as high as 18 mph.
Thursday
Mostly sunny, with a high near 72. South wind 9 to 11 mph, with gusts as high as 20 mph.
Thursday Night
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 58. South wind around 6 mph.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 77. South southwest wind 6 to 8 mph.
Friday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 58. South southwest wind around 5 mph becoming light and variable.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 82. South wind 5 to 8 mph.
Saturday Night
Partly cloudy, with a low around 62. South southeast wind around 7 mph.
Sunday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 83. South wind 8 to 15 mph, with gusts as high as 23 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:
5:31 am CDT Apr 6, 2026
Forecast Valid:
8am CDT Apr 6, 2026-6pm CDT Apr 12, 2026
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation