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.

A Few Clouds

67°F

19°C

Humidity 93%
Wind Speed Calm
Barometer 30.01 in (1015.9 mb)
Dewpoint 65°F (18°C)
Visibility 9.00 mi
Last update 23 May 8:52 pm CDT
Extended Forecast for

Carbondale IL

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly after 2am. Mostly cloudy, with a low around 62. Calm wind.

    Low: 62 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly before 3pm. Cloudy, then gradually becoming mostly sunny, with a high near 81. Light north northeast wind. Chance of precipitation is 60%.

    High: 81 °F

    Showers
    Likely then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 20 percent chance of showers after 1am. Increasing clouds, with a low around 63. Calm wind.

    Low: 63 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Memorial Day

    Memorial Day: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 80. Calm wind becoming east around 6 mph in the afternoon. Chance of precipitation is 40%.

    High: 80 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Showers likely, with thunderstorms also possible after 4am. Mostly cloudy, with a low around 65. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%.

    Low: 65 °F

    Chance
    Showers then
    Showers
    Likely

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm. High near 80. Calm wind becoming southeast around 6 mph in the morning. Chance of precipitation is 90%.

    High: 80 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 67. South southeast wind 3 to 6 mph. Chance of precipitation is 60%.

    Low: 67 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 82. South wind 5 to 7 mph.

    High: 82 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 68. South wind around 5 mph becoming calm in the evening.

    Low: 68 °F

    Chance
    T-storms

Detailed Forecast

Tonight
A 40 percent chance of showers and thunderstorms, mainly after 2am. Mostly cloudy, with a low around 62. Calm wind.
Sunday
Showers and thunderstorms likely, mainly before 3pm. Cloudy, then gradually becoming mostly sunny, with a high near 81. Light north northeast wind. Chance of precipitation is 60%.
Sunday Night
A 20 percent chance of showers after 1am. Increasing clouds, with a low around 63. Calm wind.
Memorial Day
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 80. Calm wind becoming east around 6 mph in the afternoon. Chance of precipitation is 40%.
Monday Night
Showers likely, with thunderstorms also possible after 4am. Mostly cloudy, with a low around 65. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%.
Tuesday
Showers and possibly a thunderstorm. High near 80. Calm wind becoming southeast around 6 mph in the morning. Chance of precipitation is 90%.
Tuesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 67. South southeast wind 3 to 6 mph. Chance of precipitation is 60%.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 82. South wind 5 to 7 mph.
Wednesday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 68. South wind around 5 mph becoming calm in the evening.
Thursday
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 84. Light south southeast wind.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Light east northeast wind.
Friday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 80. Calm wind becoming northeast 5 to 8 mph in the morning.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. East northeast wind 5 to 8 mph.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 79. Northeast wind 6 to 10 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Carbondale IL
 37.72°N 89.23°W
Last Update:
9:06 pm CDT May 23, 2026
Forecast Valid:
9pm CDT May 23, 2026-6pm CDT May 30, 2026
 
Forecast Discussion
 
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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