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.

Overcast

76°F

24°C

Humidity 62%
Wind Speed S 18 G 25 mph
Barometer 30.06 in (1017.5 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 13 Apr 11:52 am CDT
Extended Forecast for

Carbondale IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 82. South southwest wind 13 to 16 mph, with gusts as high as 26 mph.

    High: 82 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 68. South southwest wind around 14 mph, with gusts as high as 24 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 28 mph.

    High: 86 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 68. South southwest wind 10 to 14 mph, with gusts as high as 23 mph.

    Low: 68 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 4pm. Partly sunny, with a high near 84. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

    High: 84 °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 65. South southwest wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.

    Low: 65 °F

    Chance
    Showers then
    Showers
    Likely

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 80. Southwest wind 9 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.

    High: 80 °F

    Showers then
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 62. South southwest wind 3 to 7 mph.

    Low: 62 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 87. South wind 5 to 13 mph, with gusts as high as 21 mph.

    High: 87 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 82. South southwest wind 13 to 16 mph, with gusts as high as 26 mph.
Tonight
Partly cloudy, with a low around 68. South southwest wind around 14 mph, with gusts as high as 24 mph.
Tuesday
Mostly sunny, with a high near 86. South southwest wind 14 to 17 mph, with gusts as high as 28 mph.
Tuesday Night
Partly cloudy, with a low around 68. South southwest wind 10 to 14 mph, with gusts as high as 23 mph.
Wednesday
A chance of showers, with thunderstorms also possible after 4pm. Partly sunny, with a high near 84. 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 65. South southwest wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
Thursday
Showers and possibly a thunderstorm. High near 80. Southwest wind 9 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.
Thursday Night
Mostly clear, with a low around 62. South southwest wind 3 to 7 mph.
Friday
Mostly sunny, with a high near 87. South wind 5 to 13 mph, with gusts as high as 21 mph.
Friday Night
A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 66. South wind around 11 mph, with gusts as high as 21 mph.
Saturday
Showers and thunderstorms likely. Partly sunny, with a high near 80. South southwest wind 13 to 15 mph, with gusts as high as 24 mph.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 44. Northwest wind 8 to 11 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 65. Northwest wind 7 to 10 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Carbondale IL
 37.72°N 89.23°W
Last Update:
12:12 pm CDT Apr 13, 2026
Forecast Valid:
12pm CDT Apr 13, 2026-6pm CDT Apr 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation