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

29°F

-2°C

Humidity 66%
Wind Speed N 15 mph
Barometer 30.39 in (1029.5 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill18°F (-8°C)
Last update 4 Feb 11:52 am CST
Extended Forecast for

Carbondale IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 31. North wind around 9 mph.

    High: 31 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 15. North wind 5 to 7 mph becoming calm after midnight.

    Low: 15 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 34. Calm wind becoming south southwest 5 to 8 mph in the afternoon.

    High: 34 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 28. West southwest wind 5 to 7 mph.

    Low: 28 °F

    Decreasing
    Clouds

  • Friday

    Friday: Sunny, with a high near 50. West southwest wind 5 to 11 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 50 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 27. North northwest wind 6 to 9 mph.

    Low: 27 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 37. North wind around 6 mph becoming east in the afternoon.

    High: 37 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 26. Southeast wind 3 to 6 mph.

    Low: 26 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 52. South southwest wind 5 to 7 mph.

    High: 52 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 31. North wind around 9 mph.
Tonight
Mostly cloudy, with a low around 15. North wind 5 to 7 mph becoming calm after midnight.
Thursday
Mostly cloudy, with a high near 34. Calm wind becoming south southwest 5 to 8 mph in the afternoon.
Thursday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 28. West southwest wind 5 to 7 mph.
Friday
Sunny, with a high near 50. West southwest wind 5 to 11 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Partly cloudy, with a low around 27. North northwest wind 6 to 9 mph.
Saturday
Mostly sunny, with a high near 37. North wind around 6 mph becoming east in the afternoon.
Saturday Night
Mostly cloudy, with a low around 26. Southeast wind 3 to 6 mph.
Sunday
Partly sunny, with a high near 52. South southwest wind 5 to 7 mph.
Sunday Night
Mostly clear, with a low around 32. Light west southwest wind.
Monday
Sunny, with a high near 55. Calm wind becoming southwest around 5 mph.
Monday Night
Partly cloudy, with a low around 40. South southwest wind 3 to 5 mph.
Tuesday
A slight chance of showers. Mostly cloudy, with a high near 61. South southwest wind 5 to 7 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:
12:12 pm CST Feb 4, 2026
Forecast Valid:
12pm CST Feb 4, 2026-6pm CST Feb 10, 2026
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

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Chance of Precipitation