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.

Mostly Cloudy

77°F

25°C

Humidity 65%
Wind Speed S 5 mph
Barometer 30.23 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 2 Oct 9:58 am CDT
Extended Forecast for

Carbondale IL

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 88. Calm wind becoming south around 6 mph in the afternoon.

    High: 88 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: A 10 percent chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 65. Light south wind.

    Low: 65 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 86. Calm wind becoming south southwest around 6 mph in the morning.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 61. Calm wind.

    Low: 61 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 85. Calm wind becoming south southeast around 6 mph in the afternoon.

    High: 85 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 60. Light south southeast wind.

    Low: 60 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 86. South wind 5 to 9 mph.

    High: 86 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 64. Light south southeast wind.

    Low: 64 °F

    Mostly Clear

  • Monday

    Monday: A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 83. Calm wind becoming south southeast around 6 mph in the morning.

    High: 83 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 88. Calm wind becoming south around 6 mph in the afternoon.
Tonight
A 10 percent chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 65. Light south wind.
Friday
Sunny, with a high near 86. Calm wind becoming south southwest around 6 mph in the morning.
Friday Night
Clear, with a low around 61. Calm wind.
Saturday
Sunny, with a high near 85. Calm wind becoming south southeast around 6 mph in the afternoon.
Saturday Night
Clear, with a low around 60. Light south southeast wind.
Sunday
Sunny, with a high near 86. South wind 5 to 9 mph.
Sunday Night
Mostly clear, with a low around 64. Light south southeast wind.
Monday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 83. Calm wind becoming south southeast around 6 mph in the morning.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 64. Light east southeast wind.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 81. Calm wind becoming south southwest around 6 mph in the morning.
Tuesday Night
A chance of showers. Partly cloudy, with a low around 61. Light and variable wind becoming north northwest around 6 mph after midnight.
Wednesday
Mostly sunny, with a high near 77. North 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 89.23°W
Last Update:
8:16 am CDT Oct 2, 2025
Forecast Valid:
10am CDT Oct 2, 2025-6pm CDT Oct 8, 2025
 
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Additional Resources

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Chance of Precipitation