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

34°F

1°C

Humidity 61%
Wind Speed S 3 mph
Barometer 30.02 in (1017.0 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Last update 4 Jan 11:52 pm CST
Extended Forecast for

Carbondale IL

  • Overnight

    Overnight: Clear, with a low around 29. South wind around 6 mph.

    Low: 29 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 56. South southwest wind 6 to 10 mph.

    High: 56 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 48. South southwest wind 8 to 11 mph, with gusts as high as 22 mph.

    Low: 48 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 65. West southwest wind 5 to 11 mph, with gusts as high as 21 mph.

    High: 65 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 39. Light northwest wind.

    Low: 39 °F

    Partly Cloudy

  • Wednesday

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

    High: 61 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers after midnight. Mostly cloudy, with a low around 48. South southeast wind 3 to 6 mph.

    Low: 48 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: Showers likely. Mostly cloudy, with a high near 62. South wind 6 to 9 mph.

    High: 62 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely, mainly before midnight. Mostly cloudy, with a low around 47. South wind around 8 mph.

    Low: 47 °F

    Showers
    Likely

Detailed Forecast

Overnight
Clear, with a low around 29. South wind around 6 mph.
Monday
Sunny, with a high near 56. South southwest wind 6 to 10 mph.
Monday Night
Partly cloudy, with a low around 48. South southwest wind 8 to 11 mph, with gusts as high as 22 mph.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 65. West southwest wind 5 to 11 mph, with gusts as high as 21 mph.
Tuesday Night
Partly cloudy, with a low around 39. Light northwest wind.
Wednesday
Partly sunny, with a high near 61. Calm wind becoming south around 5 mph.
Wednesday Night
A 30 percent chance of showers after midnight. Mostly cloudy, with a low around 48. South southeast wind 3 to 6 mph.
Thursday
Showers likely. Mostly cloudy, with a high near 62. South wind 6 to 9 mph.
Thursday Night
Showers likely, mainly before midnight. Mostly cloudy, with a low around 47. South wind around 8 mph.
Friday
A chance of showers and thunderstorms, mainly before noon. Mostly sunny, with a high near 58. South wind 8 to 11 mph becoming west in the afternoon. Winds could gust as high as 18 mph.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 35. West wind 7 to 9 mph.
Saturday
Mostly sunny, with a high near 48. West wind 7 to 11 mph, with gusts as high as 18 mph.
Saturday Night
Mostly clear, with a low around 26. West northwest wind around 7 mph.
Sunday
Mostly sunny, with a high near 41. West northwest 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 89.2°W
Last Update:
9:51 pm CST Jan 4, 2026
Forecast Valid:
12am CST Jan 5, 2026-6pm CST Jan 11, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation