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

20°F

-7°C

Humidity 81%
Wind Speed NW 3 mph
Barometer 30.24 in (1024.6 mb)
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Last update 4 Dec 9:52 pm CST
Extended Forecast for

Carbondale IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 22. Calm wind.

    Low: 22 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, then gradually becoming sunny, with a high near 42. Calm wind becoming south southwest around 6 mph in the afternoon.

    High: 42 °F

    Becoming
    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 28. South wind around 6 mph becoming calm after midnight.

    Low: 28 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 45. Light and variable wind.

    High: 45 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 30. Light and variable wind.

    Low: 30 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: A 20 percent chance of showers before noon. Mostly cloudy, with a high near 44. Light and variable wind becoming north 5 to 9 mph in the morning.

    High: 44 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Sunday Night

    Sunday Night: A slight chance of rain and snow showers before midnight. Mostly cloudy, with a low around 21. North wind 6 to 9 mph. Chance of precipitation is 20%.

    Low: 21 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 35. North wind around 6 mph becoming calm in the morning.

    High: 35 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 24. Calm wind becoming south southwest 5 to 7 mph after midnight.

    Low: 24 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 22. Calm wind.
Friday
Partly sunny, then gradually becoming sunny, with a high near 42. Calm wind becoming south southwest around 6 mph in the afternoon.
Friday Night
Increasing clouds, with a low around 28. South wind around 6 mph becoming calm after midnight.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 45. Light and variable wind.
Saturday Night
A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 30. Light and variable wind.
Sunday
A 20 percent chance of showers before noon. Mostly cloudy, with a high near 44. Light and variable wind becoming north 5 to 9 mph in the morning.
Sunday Night
A slight chance of rain and snow showers before midnight. Mostly cloudy, with a low around 21. North wind 6 to 9 mph. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 35. North wind around 6 mph becoming calm in the morning.
Monday Night
Partly cloudy, with a low around 24. Calm wind becoming south southwest 5 to 7 mph after midnight.
Tuesday
Mostly sunny, with a high near 47. Southwest wind 7 to 10 mph.
Tuesday Night
Mostly cloudy, with a low around 35. South southwest wind 6 to 11 mph, with gusts as high as 18 mph.
Wednesday
A chance of showers. Mostly cloudy, with a high near 49. South southwest wind 9 to 13 mph becoming west northwest in the afternoon. Winds could gust as high as 22 mph.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 26. Northwest wind around 8 mph.
Thursday
Partly sunny, with a high near 37. West northwest wind 7 to 9 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Carbondale IL
 37.72°N 89.23°W
Last Update:
10:26 pm CST Dec 4, 2025
Forecast Valid:
10pm CST Dec 4, 2025-6pm CST Dec 11, 2025
 
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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