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

31°F

-1°C

Humidity 79%
Wind Speed N 6 mph
Barometer 30.00 in (1016.3 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 3 Jan 5:52 am CST
Extended Forecast for

Carbondale IL

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 41. North wind 6 to 8 mph.

    High: 41 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Mostly clear, with a low around 24. North northwest wind around 6 mph becoming calm in the evening.

    Low: 24 °F

    Mostly Clear

  • Sunday

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

    High: 41 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, then gradually becoming clear, with a low around 31. Calm wind becoming south southwest around 6 mph after midnight.

    Low: 31 °F

    Decreasing
    Clouds

  • Monday

    Monday: Sunny, with a high near 55. South southwest wind 6 to 10 mph.

    High: 55 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 46. South wind around 7 mph.

    Low: 46 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 63. Southwest wind 5 to 9 mph.

    High: 63 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 42. Light and variable wind.

    Low: 42 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 61. Calm wind becoming south around 5 mph.

    High: 61 °F

    Partly Sunny

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 41. North wind 6 to 8 mph.
Tonight
Mostly clear, with a low around 24. North northwest wind around 6 mph becoming calm in the evening.
Sunday
Partly sunny, with a high near 41. Calm wind.
Sunday Night
Mostly cloudy, then gradually becoming clear, with a low around 31. Calm wind becoming south southwest around 6 mph after midnight.
Monday
Sunny, with a high near 55. South southwest wind 6 to 10 mph.
Monday Night
Partly cloudy, with a low around 46. South wind around 7 mph.
Tuesday
Mostly sunny, with a high near 63. Southwest wind 5 to 9 mph.
Tuesday Night
Mostly cloudy, with a low around 42. Light and variable wind.
Wednesday
Partly sunny, with a high near 61. Calm wind becoming south around 5 mph.
Wednesday Night
A chance of showers and thunderstorms, mainly after midnight. Mostly cloudy, with a low around 50. South southeast wind 3 to 6 mph.
Thursday
Showers likely. Mostly cloudy, with a high near 65. South wind 6 to 10 mph.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 54. South wind around 9 mph.
Friday
A chance of showers. Mostly sunny, with a high near 62. Southwest wind 8 to 10 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Carbondale IL
 37.72°N 89.2°W
Last Update:
3:16 am CST Jan 3, 2026
Forecast Valid:
6am CST Jan 3, 2026-6pm CST Jan 9, 2026
 
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Additional Resources

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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