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

65°F

18°C

Humidity 93%
Wind Speed Calm
Barometer 30.02 in (1016.0 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 20 Jun 4:52 am CDT
Extended Forecast for

Carbondale IL

  • Today

    Today: Mostly sunny, with a high near 88. Light and variable wind.

    High: 88 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 68. Light east southeast wind.

    Low: 68 °F

    Mostly Clear

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly before 4pm, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 87. Light south southeast wind becoming south 12 to 17 mph in the morning. Winds could gust as high as 28 mph. Chance of precipitation is 60%.

    High: 87 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm. Low around 70. South southwest wind 9 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.

    Low: 70 °F

    T-storms then
    Showers

  • Monday

    Monday: A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm. Partly sunny, with a high near 82. West northwest wind 7 to 9 mph. Chance of precipitation is 40%.

    High: 82 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 63. North wind 5 to 8 mph becoming calm in the evening.

    Low: 63 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 82. Light north northeast wind.

    High: 82 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 85. Light and variable wind.

    High: 85 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 88. Light and variable wind.
Tonight
Mostly clear, with a low around 68. Light east southeast wind.
Sunday
Showers and thunderstorms likely, mainly before 4pm, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 87. Light south southeast wind becoming south 12 to 17 mph in the morning. Winds could gust as high as 28 mph. Chance of precipitation is 60%.
Sunday Night
Showers and possibly a thunderstorm. Low around 70. South southwest wind 9 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.
Monday
A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm. Partly sunny, with a high near 82. West northwest wind 7 to 9 mph. Chance of precipitation is 40%.
Monday Night
Partly cloudy, with a low around 63. North wind 5 to 8 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 82. Light north northeast wind.
Tuesday Night
Mostly clear, with a low around 64. Calm wind.
Wednesday
Mostly sunny, with a high near 85. Light and variable wind.
Wednesday Night
Mostly clear, with a low around 64. Calm wind.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84. Calm wind becoming west around 5 mph in the afternoon.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 64. Light and variable wind.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 85. Calm wind becoming south around 5 mph in the afternoon.
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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:
1:26 am CDT Jun 20, 2026
Forecast Valid:
4am CDT Jun 20, 2026-6pm CDT Jun 26, 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