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.

A Few Clouds and Windy

77°F

25°C

Humidity 54%
Wind Speed SW 26 G 43 mph
Barometer 30.05 in (1017.3 mb)
Dewpoint 59°F (15°C)
Visibility 9.00 mi
Heat Index79°F (26°C)
Last update 30 Mar 12:52 pm CDT
Extended Forecast for

Carbondale IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 80. Breezy, with a south southwest wind 17 to 20 mph, with gusts as high as 30 mph.

    High: 80 °F

    Sunny and
    Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 65. South southwest wind 13 to 15 mph, with gusts as high as 25 mph.

    Low: 65 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 83. Breezy, with a south southwest wind 14 to 20 mph, with gusts as high as 31 mph.

    High: 83 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 65. South southwest wind 9 to 14 mph, with gusts as high as 23 mph.

    Low: 65 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A 50 percent chance of showers. Mostly cloudy, with a high near 82. South southwest wind 7 to 11 mph, with gusts as high as 18 mph.

    High: 82 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 66. South wind 9 to 14 mph, with gusts as high as 23 mph.

    Low: 66 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 80. South wind 14 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.

    High: 80 °F

    Chance
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Mostly cloudy, with a low around 63. South wind 13 to 18 mph, with gusts as high as 28 mph.

    Low: 63 °F

    Showers

  • Friday

    Friday: Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 79. South wind 10 to 14 mph, with gusts as high as 21 mph.

    High: 79 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
Sunny, with a high near 80. Breezy, with a south southwest wind 17 to 20 mph, with gusts as high as 30 mph.
Tonight
Mostly clear, with a low around 65. South southwest wind 13 to 15 mph, with gusts as high as 25 mph.
Tuesday
Mostly sunny, with a high near 83. Breezy, with a south southwest wind 14 to 20 mph, with gusts as high as 31 mph.
Tuesday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 65. South southwest wind 9 to 14 mph, with gusts as high as 23 mph.
Wednesday
A 50 percent chance of showers. Mostly cloudy, with a high near 82. South southwest wind 7 to 11 mph, with gusts as high as 18 mph.
Wednesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 66. South wind 9 to 14 mph, with gusts as high as 23 mph.
Thursday
A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 80. South wind 14 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
Thursday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 63. South wind 13 to 18 mph, with gusts as high as 28 mph.
Friday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 79. South wind 10 to 14 mph, with gusts as high as 21 mph.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. South wind around 11 mph, with gusts as high as 20 mph.
Saturday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 73. South wind 13 to 16 mph, with gusts as high as 24 mph.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 43. West northwest wind 11 to 14 mph, with gusts as high as 20 mph.
Sunday
A chance of showers. Mostly sunny, with a high near 60. West northwest wind around 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:
1:26 pm CDT Mar 30, 2026
Forecast Valid:
1pm CDT Mar 30, 2026-6pm CDT Apr 5, 2026
 
Forecast Discussion
 
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Additional Resources

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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