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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Carbondale IL

  • Overnight

    Overnight: A 50 percent chance of showers, mainly before 5am. Mostly cloudy, with a steady temperature around 44. North northeast wind around 6 mph.

    Low: 44 °F

    Chance
    Showers

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 58. East northeast wind around 6 mph becoming calm in the afternoon.

    High: 58 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 37. Calm wind.

    Low: 37 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 67. Light south southwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 20 mph.

    High: 67 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 43. South southwest wind 5 to 8 mph becoming north northwest after midnight.

    Low: 43 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 68. North wind 5 to 9 mph becoming south in the afternoon.

    High: 68 °F

    Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of showers after midnight. Mostly clear, with a low around 35. South wind 8 to 11 mph becoming north after midnight. Winds could gust as high as 18 mph.

    Low: 35 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: A chance of showers, mainly after noon. Mostly cloudy, with a high near 45. Northeast wind around 11 mph, with gusts as high as 20 mph.

    High: 45 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Rain and snow showers before midnight, then rain showers, snow showers, and freezing rain likely. Cloudy, with a low around 32. Northeast wind around 10 mph, with gusts as high as 18 mph.

    Low: 32 °F

    Wintry Mix

Detailed Forecast

Overnight
A 50 percent chance of showers, mainly before 5am. Mostly cloudy, with a steady temperature around 44. North northeast wind around 6 mph.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 58. East northeast wind around 6 mph becoming calm in the afternoon.
Thursday Night
Mostly clear, with a low around 37. Calm wind.
Friday
Sunny, with a high near 67. Light south southwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 20 mph.
Friday Night
Mostly clear, with a low around 43. South southwest wind 5 to 8 mph becoming north northwest after midnight.
Saturday
Sunny, with a high near 68. North wind 5 to 9 mph becoming south in the afternoon.
Saturday Night
A 20 percent chance of showers after midnight. Mostly clear, with a low around 35. South wind 8 to 11 mph becoming north after midnight. Winds could gust as high as 18 mph.
Sunday
A chance of showers, mainly after noon. Mostly cloudy, with a high near 45. Northeast wind around 11 mph, with gusts as high as 20 mph.
Sunday Night
Rain and snow showers before midnight, then rain showers, snow showers, and freezing rain likely. Cloudy, with a low around 32. Northeast wind around 10 mph, with gusts as high as 18 mph.
Monday
A chance of rain and snow showers before noon, then a slight chance of rain showers. Cloudy, with a high near 44. Northeast wind 8 to 10 mph, with gusts as high as 18 mph.
Monday Night
A chance of showers. Mostly cloudy, with a low around 31. Northeast wind 6 to 8 mph.
Tuesday
A chance of showers. Cloudy, with a high near 49. East northeast wind 6 to 8 mph becoming west southwest in the afternoon.
Tuesday Night
A chance of showers. Cloudy, with a low around 35. North northeast wind around 6 mph.
Wednesday
A chance of showers. Mostly cloudy, with a high near 55. East northeast wind 6 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:
12:46 am CST Feb 26, 2026
Forecast Valid:
3am CST Feb 26, 2026-6pm CST Mar 4, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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