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

39°F

4°C

Humidity 46%
Wind Speed S 12 mph
Barometer 30.10 in (1019.4 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 18 Mar 6:52 am CDT
Extended Forecast for

Carbondale IL

  • Today

    Today: Mostly cloudy through mid morning, then gradual clearing, with a high near 62. Southwest wind 10 to 14 mph, with gusts as high as 23 mph.

    High: 62 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 44. South southwest wind around 6 mph.

    Low: 44 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 73. South southwest wind around 6 mph.

    High: 73 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 49. Light and variable wind.

    Low: 49 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 78. Calm wind becoming west southwest 5 to 7 mph in the morning.

    High: 78 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 54. South southwest wind around 5 mph.

    Low: 54 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 79. West wind 3 to 7 mph.

    High: 79 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 56. South southwest wind 6 to 8 mph.

    Low: 56 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 82. South southwest wind 8 to 14 mph, with gusts as high as 22 mph.

    High: 82 °F

    Sunny

Detailed Forecast

Today
Mostly cloudy through mid morning, then gradual clearing, with a high near 62. Southwest wind 10 to 14 mph, with gusts as high as 23 mph.
Tonight
Increasing clouds, with a low around 44. South southwest wind around 6 mph.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 73. South southwest wind around 6 mph.
Thursday Night
Mostly clear, with a low around 49. Light and variable wind.
Friday
Sunny, with a high near 78. Calm wind becoming west southwest 5 to 7 mph in the morning.
Friday Night
Partly cloudy, with a low around 54. South southwest wind around 5 mph.
Saturday
Sunny, with a high near 79. West wind 3 to 7 mph.
Saturday Night
Clear, with a low around 56. South southwest wind 6 to 8 mph.
Sunday
Sunny, with a high near 82. South southwest wind 8 to 14 mph, with gusts as high as 22 mph.
Sunday Night
Partly cloudy, with a low around 41. North northeast wind around 13 mph, with gusts as high as 22 mph.
Monday
Mostly cloudy, with a high near 56. Northeast wind 11 to 13 mph, with gusts as high as 20 mph.
Monday Night
Mostly cloudy, with a low around 37. Northeast wind 6 to 8 mph.
Tuesday
A slight chance of showers. Partly sunny, with a high near 60. East wind 6 to 8 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Carbondale IL
 37.72°N 89.23°W
Last Update:
6:01 am CDT Mar 18, 2026
Forecast Valid:
7am CDT Mar 18, 2026-6pm CDT Mar 24, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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