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

45°F

7°C

Humidity 49%
Wind Speed SE 6 mph
Barometer 30.37 in (1028.4 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 28 Mar 10:52 pm CDT
Extended Forecast for

Carbondale IL

  • Tonight

    Tonight: Mostly clear, with a low around 39. South southeast wind 3 to 5 mph.

    Low: 39 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 70. South southwest wind 6 to 15 mph, with gusts as high as 26 mph.

    High: 70 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 56. South wind 10 to 13 mph, with gusts as high as 24 mph.

    Low: 56 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 79. South southwest wind 13 to 17 mph, with gusts as high as 28 mph.

    High: 79 °F

    Mostly Sunny

  • 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: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 83. South southwest wind 15 to 18 mph, with gusts as high as 31 mph.

    High: 83 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 51. South southwest wind 13 to 16 mph becoming north northwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%.

    Low: 51 °F

    Chance
    T-storms then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers. Mostly cloudy, with a high near 60. North northeast wind 11 to 13 mph, with gusts as high as 21 mph.

    High: 60 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 47. Northeast wind 10 to 13 mph, with gusts as high as 20 mph.

    Low: 47 °F

    Showers
    Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 39. South southeast wind 3 to 5 mph.
Sunday
Mostly sunny, with a high near 70. South southwest wind 6 to 15 mph, with gusts as high as 26 mph.
Sunday Night
Partly cloudy, with a low around 56. South wind 10 to 13 mph, with gusts as high as 24 mph.
Monday
Mostly sunny, with a high near 79. South southwest wind 13 to 17 mph, with gusts as high as 28 mph.
Monday Night
Mostly clear, with a low around 65. South southwest wind around 15 mph, with gusts as high as 25 mph.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 83. South southwest wind 15 to 18 mph, with gusts as high as 31 mph.
Tuesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 51. South southwest wind 13 to 16 mph becoming north northwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%.
Wednesday
Showers. Mostly cloudy, with a high near 60. North northeast wind 11 to 13 mph, with gusts as high as 21 mph.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 47. Northeast wind 10 to 13 mph, with gusts as high as 20 mph.
Thursday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 64. East wind 11 to 13 mph becoming south in the afternoon. Winds could gust as high as 21 mph.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 49. East northeast wind 7 to 9 mph.
Friday
A chance of showers. Mostly cloudy, with a high near 72. East wind 7 to 9 mph becoming south southeast in the afternoon.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 56. South wind 8 to 10 mph, with gusts as high as 18 mph.
Saturday
Showers likely. Mostly cloudy, with a high near 71. Southwest wind 13 to 15 mph, with gusts as high as 25 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:
9:57 pm CDT Mar 28, 2026
Forecast Valid:
10pm CDT Mar 28, 2026-6pm CDT Apr 4, 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