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

41°F

5°C

Humidity 47%
Wind Speed W 12 G 16 mph
Barometer 29.93 in (1013.6 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 20 Feb 10:52 am CST
Extended Forecast for

Carbondale IL

  • Today

    Today: Sunny, with a high near 49. West wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 49 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 32. Calm wind becoming north around 5 mph after midnight.

    Low: 32 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Partly sunny, with a high near 43. North wind 5 to 9 mph.

    High: 43 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 24. Northwest wind 8 to 10 mph, with gusts as high as 18 mph.

    Low: 24 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 39. Northwest wind 10 to 17 mph, with gusts as high as 29 mph.

    High: 39 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 17. North northwest wind 11 to 14 mph, with gusts as high as 21 mph.

    Low: 17 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 35. North northwest wind 7 to 13 mph, with gusts as high as 21 mph.

    High: 35 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 18. North northwest wind around 5 mph becoming calm in the evening.

    Low: 18 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 46. Light south wind becoming south southwest 9 to 14 mph in the morning. Winds could gust as high as 23 mph.

    High: 46 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 49. West wind 5 to 10 mph, with gusts as high as 20 mph.
Tonight
Increasing clouds, with a low around 32. Calm wind becoming north around 5 mph after midnight.
Saturday
Partly sunny, with a high near 43. North wind 5 to 9 mph.
Saturday Night
Mostly clear, with a low around 24. Northwest wind 8 to 10 mph, with gusts as high as 18 mph.
Sunday
Sunny, with a high near 39. Northwest wind 10 to 17 mph, with gusts as high as 29 mph.
Sunday Night
Clear, with a low around 17. North northwest wind 11 to 14 mph, with gusts as high as 21 mph.
Monday
Sunny, with a high near 35. North northwest wind 7 to 13 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 18. North northwest wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 46. Light south wind becoming south southwest 9 to 14 mph in the morning. Winds could gust as high as 23 mph.
Tuesday Night
Mostly cloudy, with a low around 39. South southwest wind around 14 mph, with gusts as high as 24 mph.
Wednesday
A slight chance of showers. Mostly cloudy, with a high near 57. Southwest wind 9 to 14 mph, with gusts as high as 24 mph.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 36. Southwest wind 6 to 8 mph becoming north northwest after midnight.
Thursday
A slight chance of showers. Mostly sunny, with a high near 55. North northwest wind 6 to 9 mph becoming northeast in the afternoon.
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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:
11:12 am CST Feb 20, 2026
Forecast Valid:
11am CST Feb 20, 2026-6pm CST Feb 26, 2026
 
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