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

59°F

15°C

Humidity 67%
Wind Speed S 6 mph
Barometer 29.74 in (1007.2 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 6 Jan 4:52 pm CST
Extended Forecast for

Carbondale IL

  • Tonight

    Tonight: Mostly clear, with a low around 36. West southwest wind 5 to 7 mph becoming calm in the evening.

    Low: 36 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 59. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 59 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 45. South southeast wind 3 to 7 mph.

    Low: 45 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Showers, with thunderstorms also possible after 3pm. High near 65. South southeast wind 7 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 80%.

    High: 65 °F

    Chance
    Showers then
    Showers

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before midnight, then a chance of showers. Low around 56. South southwest wind 9 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.

    Low: 56 °F

    Showers then
    Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers. Mostly cloudy, with a high near 62. Southwest wind 6 to 9 mph becoming north northeast in the afternoon.

    High: 62 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 45. Northeast wind 6 to 8 mph becoming west after midnight.

    Low: 45 °F

    Chance
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 50. West northwest wind 9 to 14 mph, with gusts as high as 22 mph.

    High: 50 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 28. West northwest wind 7 to 10 mph.

    Low: 28 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 36. West southwest wind 5 to 7 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 59. Calm wind becoming south 5 to 7 mph in the afternoon.
Wednesday Night
Increasing clouds, with a low around 45. South southeast wind 3 to 7 mph.
Thursday
Showers, with thunderstorms also possible after 3pm. High near 65. South southeast wind 7 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 80%.
Thursday Night
Showers and possibly a thunderstorm before midnight, then a chance of showers. Low around 56. South southwest wind 9 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.
Friday
A 30 percent chance of showers. Mostly cloudy, with a high near 62. Southwest wind 6 to 9 mph becoming north northeast in the afternoon.
Friday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 45. Northeast wind 6 to 8 mph becoming west after midnight.
Saturday
Partly sunny, with a high near 50. West northwest wind 9 to 14 mph, with gusts as high as 22 mph.
Saturday Night
Partly cloudy, with a low around 28. West northwest wind 7 to 10 mph.
Sunday
Mostly sunny, with a high near 39. West northwest wind 5 to 9 mph.
Sunday Night
Mostly clear, with a low around 26. Light and variable wind.
Monday
Sunny, with a high near 47. Light southwest wind becoming south southwest 5 to 9 mph in the morning.
Monday Night
Partly cloudy, with a low around 31. Southwest wind around 6 mph.
Tuesday
Mostly sunny, with a high near 49. West southwest 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 89.2°W
Last Update:
3:16 pm CST Jan 6, 2026
Forecast Valid:
5pm CST Jan 6, 2026-6pm CST Jan 13, 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