National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fog

40°F

4°C

Humidity 100%
Wind Speed W 5 mph
Barometer 30.17 in (1021.7 mb)
Dewpoint 40°F (4°C)
Visibility 0.25 mi
Wind Chill36°F (2°C)
Last update 23 Nov 12:52 am CST
Extended Forecast for

Carbondale IL

Dense Fog Advisory until November 23, 09:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until November 23, 09:00am

    NOW until 9:00am Sun

    Dense Fog Advisory

  • Overnight

    Low: 40 °F

    Dense Fog

  • Sunday

    Sunday: Widespread dense fog, mainly before 8am. Otherwise, sunny, with a high near 61. Calm wind.

    High: 61 °F

    Dense Fog
    then Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 42. Calm wind.

    Low: 42 °F

    Increasing
    Clouds

  • Monday

    Monday: A 50 percent chance of showers after noon. Cloudy, with a high near 58. Calm wind becoming south southeast 5 to 7 mph in the morning.

    High: 58 °F

    Mostly Cloudy
    then Chance
    Showers

  • Monday Night

    Monday Night: Showers. Low around 51. South southeast wind around 6 mph becoming southwest after midnight. Chance of precipitation is 100%.

    Low: 51 °F

    Showers then
    Showers
    Likely

  • Tuesday

    Tuesday: A 20 percent chance of showers before noon. Mostly cloudy, with a high near 65. Southwest wind 5 to 8 mph.

    High: 65 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 38. West northwest wind 5 to 10 mph.

    Low: 38 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 48. West northwest wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 48 °F

    Sunny

Detailed Forecast

Overnight
Widespread dense fog. Otherwise, mostly clear, with a low around 40. Calm wind.
Sunday
Widespread dense fog, mainly before 8am. Otherwise, sunny, with a high near 61. Calm wind.
Sunday Night
Increasing clouds, with a low around 42. Calm wind.
Monday
A 50 percent chance of showers after noon. Cloudy, with a high near 58. Calm wind becoming south southeast 5 to 7 mph in the morning.
Monday Night
Showers. Low around 51. South southeast wind around 6 mph becoming southwest after midnight. Chance of precipitation is 100%.
Tuesday
A 20 percent chance of showers before noon. Mostly cloudy, with a high near 65. Southwest wind 5 to 8 mph.
Tuesday Night
Partly cloudy, with a low around 38. West northwest wind 5 to 10 mph.
Wednesday
Sunny, with a high near 48. West northwest wind 7 to 11 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 29. West northwest wind 3 to 6 mph.
Thanksgiving Day
Sunny, with a high near 46. West northwest wind 3 to 7 mph.
Thursday Night
Partly cloudy, with a low around 27. Calm wind.
Friday
Mostly sunny, with a high near 47. Calm wind becoming west around 6 mph in the morning.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 30. Calm wind becoming southeast around 5 mph after midnight.
Saturday
A slight chance of showers. Partly sunny, with a high near 49. South southeast wind 5 to 8 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:
10:26 pm CST Nov 22, 2025
Forecast Valid:
1am CST Nov 23, 2025-6pm CST Nov 29, 2025
 
Forecast Discussion
 
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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