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.

Mostly Cloudy and Breezy

64°F

18°C

Humidity 75%
Wind Speed S 21 G 26 mph
Barometer 30.12 in (1019.9 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 30 Mar 7:52 am CDT
Extended Forecast for

Carbondale IL

  • Today

    Today: Mostly sunny, with a high near 80. Breezy, with a south southwest wind 15 to 22 mph, with gusts as high as 33 mph.

    High: 80 °F

    Mostly Sunny
    then Sunny
    and Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 65. South southwest wind 14 to 17 mph, with gusts as high as 28 mph.

    Low: 65 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 83. Breezy, with a south southwest wind 14 to 22 mph, with gusts as high as 34 mph.

    High: 83 °F

    Mostly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 64. South southwest wind 9 to 15 mph, with gusts as high as 25 mph.

    Low: 64 °F

    Partly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: Showers likely, with thunderstorms also possible after 1pm. Partly sunny, with a high near 82. South southwest wind 7 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.

    High: 82 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 66. South wind 9 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.

    Low: 66 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 78. South wind 14 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 70%.

    High: 78 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Mostly cloudy, with a low around 63. South wind 14 to 17 mph, with gusts as high as 25 mph.

    Low: 63 °F

    Showers

  • Friday

    Friday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 77. South wind 10 to 13 mph, with gusts as high as 20 mph.

    High: 77 °F

    Showers
    Likely

Detailed Forecast

Today
Mostly sunny, with a high near 80. Breezy, with a south southwest wind 15 to 22 mph, with gusts as high as 33 mph.
Tonight
Mostly clear, with a low around 65. South southwest wind 14 to 17 mph, with gusts as high as 28 mph.
Tuesday
Mostly sunny, with a high near 83. Breezy, with a south southwest wind 14 to 22 mph, with gusts as high as 34 mph.
Tuesday Night
A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 64. South southwest wind 9 to 15 mph, with gusts as high as 25 mph.
Wednesday
Showers likely, with thunderstorms also possible after 1pm. Partly sunny, with a high near 82. South southwest wind 7 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.
Wednesday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 66. South wind 9 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.
Thursday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 78. South wind 14 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 70%.
Thursday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 63. South wind 14 to 17 mph, with gusts as high as 25 mph.
Friday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 77. South wind 10 to 13 mph, with gusts as high as 20 mph.
Friday Night
A chance of showers. Mostly cloudy, with a low around 61. South southeast wind around 11 mph, with gusts as high as 18 mph.
Saturday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 72. South wind 11 to 15 mph becoming west in the afternoon. Winds could gust as high as 24 mph.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 43. West northwest wind 11 to 13 mph, with gusts as high as 20 mph.
Sunday
A chance of showers. Mostly sunny, with a high near 60. Northwest wind 11 to 14 mph, with gusts as high as 21 mph.
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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:
7:12 am CDT Mar 30, 2026
Forecast Valid:
8am CDT Mar 30, 2026-6pm CDT Apr 5, 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