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

40°F

4°C

Humidity 73%
Wind Speed Calm
Barometer 30.33 in (1027.4 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 12 Feb 9:52 am CST
Extended Forecast for

Carbondale IL

  • Today

    Today: Mostly sunny, with a high near 52. Calm wind becoming southeast around 6 mph in the afternoon.

    High: 52 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 32. Southeast wind 3 to 5 mph.

    Low: 32 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 58. Calm wind becoming south southeast around 6 mph.

    High: 58 °F

    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 39. Calm wind.

    Low: 39 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Rain likely, mainly after noon. Cloudy, with a high near 53. Calm wind becoming southeast around 6 mph in the morning. Chance of precipitation is 70%.

    High: 53 °F

    Chance Rain
    then Rain
    Likely

  • Saturday Night

    Saturday Night: Rain. Low around 45. East southeast wind 6 to 8 mph becoming northeast after midnight. Chance of precipitation is 90%.

    Low: 45 °F

    Rain

  • Sunday

    Sunday: A 50 percent chance of rain, mainly before noon. Partly sunny, with a high near 56. North northeast wind 7 to 10 mph, with gusts as high as 18 mph.

    High: 56 °F

    Chance Rain
    then Slight
    Chance Rain

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 37. North wind around 6 mph becoming calm in the evening.

    Low: 37 °F

    Mostly Clear

  • Washington's Birthday

    Washington's Birthday: Sunny, with a high near 61. Calm wind becoming south 5 to 7 mph in the morning.

    High: 61 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 52. Calm wind becoming southeast around 6 mph in the afternoon.
Tonight
Partly cloudy, with a low around 32. Southeast wind 3 to 5 mph.
Friday
Sunny, with a high near 58. Calm wind becoming south southeast around 6 mph.
Friday Night
Increasing clouds, with a low around 39. Calm wind.
Saturday
Rain likely, mainly after noon. Cloudy, with a high near 53. Calm wind becoming southeast around 6 mph in the morning. Chance of precipitation is 70%.
Saturday Night
Rain. Low around 45. East southeast wind 6 to 8 mph becoming northeast after midnight. Chance of precipitation is 90%.
Sunday
A 50 percent chance of rain, mainly before noon. Partly sunny, with a high near 56. North northeast wind 7 to 10 mph, with gusts as high as 18 mph.
Sunday Night
Mostly clear, with a low around 37. North wind around 6 mph becoming calm in the evening.
Washington's Birthday
Sunny, with a high near 61. Calm wind becoming south 5 to 7 mph in the morning.
Monday Night
Mostly cloudy, with a low around 45. South wind around 6 mph.
Tuesday
Mostly cloudy, with a high near 65. South wind 7 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly cloudy, with a low around 55. South southwest wind 14 to 16 mph, with gusts as high as 25 mph.
Wednesday
A slight chance of rain. Mostly cloudy, with a high near 67. Southwest wind 11 to 15 mph, with gusts as high as 24 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:
10:41 am CST Feb 12, 2026
Forecast Valid:
10am CST Feb 12, 2026-6pm CST Feb 18, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation