National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

63°F

17°C

Humidity 93%
Wind Speed Calm
Barometer 30.02 in (1016.3 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 20 Sep 4:52 am CDT
Extended Forecast for

Carbondale IL

  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms. Patchy fog. Otherwise, partly cloudy, with a low around 63. Calm wind.

    Low: 63 °F

    Slight Chance
    T-storms and
    Patchy Fog

  • Saturday

    Saturday: A slight chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms after 3pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 89. Calm wind becoming south southwest around 5 mph in the afternoon. Chance of precipitation is 20%.

    High: 89 °F

    Slight Chance
    T-storms and
    Patchy Fog

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms, mainly after 7pm. Increasing clouds, with a low around 66. Calm wind.

    Low: 66 °F

    Chance
    Showers

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 86. South southwest wind 3 to 8 mph.

    High: 86 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. South southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%.

    Low: 66 °F

    Chance
    T-storms then
    Showers
    Likely

  • Monday

    Monday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 83. South wind 5 to 9 mph. Chance of precipitation is 70%.

    High: 83 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 65. South southwest wind 3 to 6 mph. Chance of precipitation is 60%.

    Low: 65 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 77. South southwest wind 3 to 7 mph.

    High: 77 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. Light and variable wind.

    Low: 65 °F

    Showers
    Likely

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms. Patchy fog. Otherwise, partly cloudy, with a low around 63. Calm wind.
Saturday
A slight chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms after 3pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 89. Calm wind becoming south southwest around 5 mph in the afternoon. Chance of precipitation is 20%.
Saturday Night
A 50 percent chance of showers and thunderstorms, mainly after 7pm. Increasing clouds, with a low around 66. Calm wind.
Sunday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 86. South southwest wind 3 to 8 mph.
Sunday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. South southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%.
Monday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 83. South wind 5 to 9 mph. Chance of precipitation is 70%.
Monday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 65. South southwest wind 3 to 6 mph. Chance of precipitation is 60%.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 77. South southwest wind 3 to 7 mph.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. Light and variable wind.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 77. East wind 5 to 8 mph.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Northeast wind 3 to 6 mph.
Thursday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 74. Northwest wind 6 to 8 mph.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 58. North northwest wind around 5 mph becoming calm in the evening.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 75. West northwest wind 3 to 7 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Carbondale IL
 37.72°N 89.2°W
Last Update:
5:31 am CDT Sep 20, 2025
Forecast Valid:
5am CDT Sep 20, 2025-6pm CDT Sep 26, 2025
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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