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.

Partly Cloudy

86°F

30°C

Humidity 49%
Wind Speed N 8 mph
Barometer 29.98 in (1014.7 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 20 Aug 3:52 pm CDT
Extended Forecast for

Carbondale IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 88. North northeast wind around 10 mph.

    High: 88 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 65. North northeast wind 5 to 9 mph.

    Low: 65 °F

    Mostly Clear

  • Thursday

    Thursday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 85. North northeast wind 5 to 10 mph.

    High: 85 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 64. Northeast wind 5 to 7 mph becoming calm in the evening.

    Low: 64 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 88. Calm wind becoming north northeast around 6 mph in the morning.

    High: 88 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 65. Light northeast wind.

    Low: 65 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 91. Calm wind becoming north northwest around 6 mph in the afternoon.

    High: 91 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 65. North wind around 6 mph becoming calm in the evening.

    Low: 65 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 84. North northwest wind 5 to 9 mph.

    High: 84 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 88. North northeast wind around 10 mph.
Tonight
Mostly clear, with a low around 65. North northeast wind 5 to 9 mph.
Thursday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 85. North northeast wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 64. Northeast wind 5 to 7 mph becoming calm in the evening.
Friday
Sunny, with a high near 88. Calm wind becoming north northeast around 6 mph in the morning.
Friday Night
Mostly clear, with a low around 65. Light northeast wind.
Saturday
Sunny, with a high near 91. Calm wind becoming north northwest around 6 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 65. North wind around 6 mph becoming calm in the evening.
Sunday
Sunny, with a high near 84. North northwest wind 5 to 9 mph.
Sunday Night
Mostly clear, with a low around 58. North wind 5 to 7 mph becoming calm in the evening.
Monday
Sunny, with a high near 79. North northwest wind 3 to 8 mph.
Monday Night
Partly cloudy, with a low around 55. North wind around 6 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 77. Calm wind becoming north northwest around 5 mph in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Carbondale IL
 37.7°N 89.2°W
Last Update:
4:30 pm CDT Aug 20, 2025
Forecast Valid:
4pm CDT Aug 20, 2025-6pm CDT Aug 26, 2025
 
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Additional Resources

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