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

35°F

2°C

Humidity 93%
Wind Speed Calm
Barometer 29.92 in (1013.6 mb)
Dewpoint 33°F (1°C)
Visibility 7.00 mi
Last update 1 Jan 6:52 pm CST
Extended Forecast for

Carbondale IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 31. Calm wind.

    Low: 31 °F

    Mostly Cloudy

  • Friday

    Friday: Cloudy, with a high near 41. Calm wind becoming east northeast around 6 mph in the morning.

    High: 41 °F

    Cloudy

  • Friday Night

    Friday Night: Cloudy, with a low around 30. Northeast wind around 6 mph.

    Low: 30 °F

    Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 42. North northeast wind around 6 mph.

    High: 42 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 25. Light north northwest wind.

    Low: 25 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 43. Calm wind.

    High: 43 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 33. Calm wind becoming south southwest 5 to 7 mph after midnight.

    Low: 33 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 56. South southwest wind 7 to 10 mph, with gusts as high as 18 mph.

    High: 56 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 45. South wind 6 to 9 mph.

    Low: 45 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 31. Calm wind.
Friday
Cloudy, with a high near 41. Calm wind becoming east northeast around 6 mph in the morning.
Friday Night
Cloudy, with a low around 30. Northeast wind around 6 mph.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 42. North northeast wind around 6 mph.
Saturday Night
Mostly clear, with a low around 25. Light north northwest wind.
Sunday
Mostly sunny, with a high near 43. Calm wind.
Sunday Night
Partly cloudy, with a low around 33. Calm wind becoming south southwest 5 to 7 mph after midnight.
Monday
Mostly sunny, with a high near 56. South southwest wind 7 to 10 mph, with gusts as high as 18 mph.
Monday Night
Partly cloudy, with a low around 45. South wind 6 to 9 mph.
Tuesday
Partly sunny, with a high near 62. Southwest wind 8 to 11 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 42. South southwest wind 5 to 7 mph becoming light and variable after midnight.
Wednesday
Partly sunny, with a high near 59. Light and variable wind becoming west southwest around 5 mph.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 45. Calm wind becoming south southeast around 6 mph after midnight.
Thursday
A chance of showers. Mostly cloudy, with a high near 60. South southeast wind 6 to 9 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:
7:31 pm CST Jan 1, 2026
Forecast Valid:
7pm CST Jan 1, 2026-6pm CST Jan 8, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation