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

33°F

1°C

Humidity 78%
Wind Speed NE 9 mph
Barometer 29.95 in (1014.5 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 2 Jan 9:52 am CST
Extended Forecast for

Carbondale IL

  • Today

    Today: Cloudy, with a high near 39. Northeast wind around 7 mph.

    High: 39 °F

    Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 30. Northeast wind around 6 mph.

    Low: 30 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 42. North wind 5 to 7 mph.

    High: 42 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 25. North northwest wind around 5 mph becoming calm in the evening.

    Low: 25 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 41. Calm wind.

    High: 41 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 31. Calm wind becoming south southwest 5 to 7 mph after midnight.

    Low: 31 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 55. South southwest wind 7 to 10 mph, with gusts as high as 18 mph.

    High: 55 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 45. South southwest wind 7 to 9 mph.

    Low: 45 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 62. Southwest wind 7 to 10 mph, with gusts as high as 18 mph.

    High: 62 °F

    Partly Sunny

Detailed Forecast

Today
Cloudy, with a high near 39. Northeast wind around 7 mph.
Tonight
Mostly cloudy, with a low around 30. Northeast wind around 6 mph.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 42. North wind 5 to 7 mph.
Saturday Night
Mostly clear, with a low around 25. North northwest wind around 5 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 41. Calm wind.
Sunday Night
Partly cloudy, with a low around 31. Calm wind becoming south southwest 5 to 7 mph after midnight.
Monday
Sunny, with a high near 55. South southwest wind 7 to 10 mph, with gusts as high as 18 mph.
Monday Night
Partly cloudy, with a low around 45. South southwest wind 7 to 9 mph.
Tuesday
Partly sunny, with a high near 62. Southwest wind 7 to 10 mph, with gusts as high as 18 mph.
Tuesday Night
Mostly cloudy, with a low around 42. South southwest wind around 6 mph becoming calm after midnight.
Wednesday
Partly sunny, with a high near 61. Calm wind becoming southwest around 5 mph.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 47. Southeast wind 3 to 6 mph.
Thursday
A chance of showers. Mostly cloudy, with a high near 61. 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:
7:57 am CST Jan 2, 2026
Forecast Valid:
10am CST Jan 2, 2026-6pm CST Jan 8, 2026
 
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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