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.

A Few Clouds

29°F

-2°C

Humidity 78%
Wind Speed SW 6 mph
Barometer 30.11 in (1020.1 mb)
Dewpoint 23°F (-5°C)
Visibility 7.00 mi
Wind Chill23°F (-5°C)
Last update 5 Dec 9:52 am CST
Extended Forecast for

Carbondale IL

  • Today

    Today: Sunny, with a high near 42. South southwest wind 3 to 7 mph.

    High: 42 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 28. Southwest wind 3 to 6 mph.

    Low: 28 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Cloudy, then gradually becoming mostly sunny, with a high near 44. Calm wind.

    High: 44 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 31. Light east southeast wind.

    Low: 31 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: A 20 percent chance of showers before noon. Mostly cloudy, with a high near 45. Light and variable wind becoming north northwest 5 to 10 mph in the morning.

    High: 45 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Sunday Night

    Sunday Night: A slight chance of rain and snow showers before 9pm, then a slight chance of snow showers between 9pm and midnight. Mostly cloudy, with a low around 20. North wind 5 to 10 mph. Chance of precipitation is 20%.

    Low: 20 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 35. North wind around 5 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 8 mph after midnight.

    Low: 24 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 46. South southwest wind around 10 mph, with gusts as high as 18 mph.

    High: 46 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 42. South southwest wind 3 to 7 mph.
Tonight
Increasing clouds, with a low around 28. Southwest wind 3 to 6 mph.
Saturday
Cloudy, then gradually becoming mostly sunny, with a high near 44. Calm wind.
Saturday Night
A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 31. Light east southeast wind.
Sunday
A 20 percent chance of showers before noon. Mostly cloudy, with a high near 45. Light and variable wind becoming north northwest 5 to 10 mph in the morning.
Sunday Night
A slight chance of rain and snow showers before 9pm, then a slight chance of snow showers between 9pm and midnight. Mostly cloudy, with a low around 20. North wind 5 to 10 mph. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 35. North wind around 5 mph becoming calm in the morning.
Monday Night
Partly cloudy, with a low around 24. Calm wind becoming south southwest 5 to 8 mph after midnight.
Tuesday
Mostly sunny, with a high near 46. South southwest wind around 10 mph, with gusts as high as 18 mph.
Tuesday Night
Mostly cloudy, with a low around 37. South southwest wind 9 to 14 mph, with gusts as high as 22 mph.
Wednesday
A slight chance of showers. Mostly cloudy, with a high near 50. South southwest wind 9 to 14 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 24. Northwest wind around 8 mph.
Thursday
Partly sunny, with a high near 36. Northwest wind 6 to 8 mph becoming south southwest in the afternoon.
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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:
7:56 am CST Dec 5, 2025
Forecast Valid:
10am CST Dec 5, 2025-6pm CST Dec 11, 2025
 
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