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

71°F

22°C

Humidity 73%
Wind Speed SW 15 mph
Barometer 30.03 in (1016.5 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 13 Apr 4:52 am CDT
Extended Forecast for

Carbondale IL

  • Today

    Today: Mostly sunny, with a high near 82. South southwest wind 13 to 17 mph, with gusts as high as 29 mph.

    High: 82 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 68. South wind 14 to 16 mph, with gusts as high as 29 mph.

    Low: 68 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 86. South southwest wind 14 to 17 mph, with gusts as high as 26 mph.

    High: 86 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 69. South southwest wind 10 to 14 mph, with gusts as high as 23 mph.

    Low: 69 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 85. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

    High: 85 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. South southwest wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    Low: 64 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 82. South southwest wind 10 to 13 mph, with gusts as high as 21 mph.

    High: 82 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 63. South southwest wind around 6 mph.

    Low: 63 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 87. South wind 5 to 13 mph, with gusts as high as 22 mph.

    High: 87 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 82. South southwest wind 13 to 17 mph, with gusts as high as 29 mph.
Tonight
Partly cloudy, with a low around 68. South wind 14 to 16 mph, with gusts as high as 29 mph.
Tuesday
Mostly sunny, with a high near 86. South southwest wind 14 to 17 mph, with gusts as high as 26 mph.
Tuesday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 69. South southwest wind 10 to 14 mph, with gusts as high as 23 mph.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 85. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. South southwest wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Thursday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 82. South southwest wind 10 to 13 mph, with gusts as high as 21 mph.
Thursday Night
Mostly clear, with a low around 63. South southwest wind around 6 mph.
Friday
Mostly sunny, with a high near 87. South wind 5 to 13 mph, with gusts as high as 22 mph.
Friday Night
A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 65. South wind 9 to 11 mph, with gusts as high as 21 mph.
Saturday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 79. South southwest wind 11 to 14 mph becoming west in the afternoon. Winds could gust as high as 23 mph.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 45. Northwest wind 7 to 10 mph.
Sunday
Mostly sunny, with a high near 65. North northwest wind 7 to 9 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 am CDT Apr 13, 2026
Forecast Valid:
5am CDT Apr 13, 2026-6pm CDT Apr 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation