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

43°F

6°C

Humidity 51%
Wind Speed S 3 mph
Barometer 30.31 in (1026.4 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Last update 29 Mar 6:52 am CDT
Extended Forecast for

Carbondale IL

  • Today

    Today: Mostly sunny, with a high near 70. South wind 6 to 16 mph, with gusts as high as 25 mph.

    High: 70 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 56. South wind 9 to 11 mph, with gusts as high as 21 mph.

    Low: 56 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 79. Breezy, with a south southwest wind 13 to 20 mph, with gusts as high as 32 mph.

    High: 79 °F

    Mostly Sunny
    then Sunny
    and Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 65. South southwest wind around 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 15 to 21 mph, with gusts as high as 34 mph.

    High: 83 °F

    Mostly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: A slight chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 55. South southwest wind 10 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 60%.

    Low: 55 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 69. Northwest wind around 11 mph becoming north northeast in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%.

    High: 69 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Cloudy, with a low around 53. Northeast wind 8 to 10 mph.

    Low: 53 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm. Cloudy, with a high near 69. Southeast wind around 10 mph becoming southwest in the afternoon. Winds could gust as high as 18 mph.

    High: 69 °F

    Showers
    Likely

Detailed Forecast

Today
Mostly sunny, with a high near 70. South wind 6 to 16 mph, with gusts as high as 25 mph.
Tonight
Mostly clear, with a low around 56. South wind 9 to 11 mph, with gusts as high as 21 mph.
Monday
Mostly sunny, with a high near 79. Breezy, with a south southwest wind 13 to 20 mph, with gusts as high as 32 mph.
Monday Night
Mostly clear, with a low around 65. South southwest wind around 15 mph, with gusts as high as 25 mph.
Tuesday
Mostly sunny, with a high near 83. Breezy, with a south southwest wind 15 to 21 mph, with gusts as high as 34 mph.
Tuesday Night
A slight chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 55. South southwest wind 10 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 60%.
Wednesday
Showers and possibly a thunderstorm. High near 69. Northwest wind around 11 mph becoming north northeast in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%.
Wednesday Night
Showers likely and possibly a thunderstorm. Cloudy, with a low around 53. Northeast wind 8 to 10 mph.
Thursday
Showers likely and possibly a thunderstorm. Cloudy, with a high near 69. Southeast wind around 10 mph becoming southwest in the afternoon. Winds could gust as high as 18 mph.
Thursday Night
Showers likely. Mostly cloudy, with a low around 53. Southwest wind around 9 mph.
Friday
A chance of showers. Mostly cloudy, with a high near 76. South wind 8 to 10 mph.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. South wind around 9 mph.
Saturday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 73. South wind 11 to 14 mph, with gusts as high as 22 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Carbondale IL
 37.72°N 89.23°W
Last Update:
6:16 am CDT Mar 29, 2026
Forecast Valid:
7am CDT Mar 29, 2026-6pm CDT Apr 4, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation