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 30.10 in (1019.3 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 25 Mar 4:52 am CDT
Extended Forecast for

Carbondale IL

  • Today

    Today: Mostly sunny, with a high near 75. Light and variable wind becoming south southwest 8 to 13 mph in the morning. Winds could gust as high as 18 mph.

    High: 75 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 63. South wind 9 to 13 mph, with gusts as high as 22 mph.

    Low: 63 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 86. South southwest wind 13 to 17 mph, with gusts as high as 26 mph.

    High: 86 °F

    Sunny

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm after 1am. Increasing clouds, with a low around 45. South southwest wind 11 to 15 mph becoming north after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 60%.

    Low: 45 °F

    Partly Cloudy
    then Showers
    Likely

  • Friday

    Friday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 54. North wind 14 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.

    High: 54 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Mostly clear, with a low around 34. North northeast wind 6 to 11 mph, with gusts as high as 20 mph.

    Low: 34 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 59. Light and variable wind becoming east northeast around 6 mph in the morning.

    High: 59 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 40. Southeast wind 3 to 5 mph.

    Low: 40 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 65. South wind 5 to 9 mph.

    High: 65 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 75. Light and variable wind becoming south southwest 8 to 13 mph in the morning. Winds could gust as high as 18 mph.
Tonight
Mostly clear, with a low around 63. South wind 9 to 13 mph, with gusts as high as 22 mph.
Thursday
Sunny, with a high near 86. South southwest wind 13 to 17 mph, with gusts as high as 26 mph.
Thursday Night
Showers likely and possibly a thunderstorm after 1am. Increasing clouds, with a low around 45. South southwest wind 11 to 15 mph becoming north after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 60%.
Friday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 54. North wind 14 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
Friday Night
Mostly clear, with a low around 34. North northeast wind 6 to 11 mph, with gusts as high as 20 mph.
Saturday
Sunny, with a high near 59. Light and variable wind becoming east northeast around 6 mph in the morning.
Saturday Night
Partly cloudy, with a low around 40. Southeast wind 3 to 5 mph.
Sunday
Partly sunny, with a high near 65. South wind 5 to 9 mph.
Sunday Night
Mostly cloudy, with a low around 55. South wind 7 to 9 mph, with gusts as high as 18 mph.
Monday
Mostly sunny, with a high near 79. South southwest wind 10 to 14 mph, with gusts as high as 23 mph.
Monday Night
A slight chance of showers. Mostly cloudy, with a low around 62. South wind around 11 mph, with gusts as high as 20 mph.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 79. South southwest wind 11 to 15 mph, with gusts as high as 23 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Carbondale IL
 37.72°N 89.23°W
Last Update:
5:26 am CDT Mar 25, 2026
Forecast Valid:
5am CDT Mar 25, 2026-6pm CDT Mar 31, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation