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.

Overcast

47°F

8°C

Humidity 93%
Wind Speed S 13 mph
Barometer 29.98 in (1015.2 mb)
Dewpoint 45°F (7°C)
Visibility 7.00 mi
Wind Chill41°F (5°C)
Last update 17 Feb 8:52 am CST
Extended Forecast for

Carbondale IL

  • Today

    Today: Cloudy, with a high near 64. South wind 11 to 17 mph, with gusts as high as 30 mph.

    High: 64 °F

    Cloudy

  • Tonight

    Tonight: A 20 percent chance of rain after 5am. Mostly cloudy, with a steady temperature around 59. Breezy, with a south southwest wind 16 to 21 mph, with gusts as high as 33 mph.

    Low: 59 °F

    Breezy.
    Cloudy then
    Slight Chance
    Rain

  • Wednesday

    Wednesday: Mostly sunny, with a high near 73. Southwest wind 8 to 16 mph, with gusts as high as 28 mph.

    High: 73 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers after midnight. Partly cloudy, with a low around 56. South wind around 7 mph.

    Low: 56 °F

    Mostly Clear
    then Chance
    Showers

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 72. South southwest wind 7 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 50%.

    High: 72 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 41. South southwest wind 8 to 13 mph becoming west after midnight. Winds could gust as high as 21 mph.

    Low: 41 °F

    Chance
    T-storms then
    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 55. West northwest wind 6 to 11 mph, with gusts as high as 18 mph.

    High: 55 °F

    Sunny

  • Friday Night

    Friday Night: A slight chance of showers after midnight. Partly cloudy, with a low around 34. Light and variable wind becoming north around 6 mph after midnight.

    Low: 34 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: A chance of showers. Mostly sunny, with a high near 47. North northwest wind 6 to 9 mph.

    High: 47 °F

    Chance
    Showers

Detailed Forecast

Today
Cloudy, with a high near 64. South wind 11 to 17 mph, with gusts as high as 30 mph.
Tonight
A 20 percent chance of rain after 5am. Mostly cloudy, with a steady temperature around 59. Breezy, with a south southwest wind 16 to 21 mph, with gusts as high as 33 mph.
Wednesday
Mostly sunny, with a high near 73. Southwest wind 8 to 16 mph, with gusts as high as 28 mph.
Wednesday Night
A 30 percent chance of showers after midnight. Partly cloudy, with a low around 56. South wind around 7 mph.
Thursday
A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 72. South southwest wind 7 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 50%.
Thursday Night
A 30 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 41. South southwest wind 8 to 13 mph becoming west after midnight. Winds could gust as high as 21 mph.
Friday
Sunny, with a high near 55. West northwest wind 6 to 11 mph, with gusts as high as 18 mph.
Friday Night
A slight chance of showers after midnight. Partly cloudy, with a low around 34. Light and variable wind becoming north around 6 mph after midnight.
Saturday
A chance of showers. Mostly sunny, with a high near 47. North northwest wind 6 to 9 mph.
Saturday Night
A slight chance of rain and snow showers before midnight, then a slight chance of rain showers. Mostly clear, with a low around 28. North northwest wind 7 to 9 mph.
Sunday
Sunny, with a high near 42. Northwest wind 9 to 13 mph, with gusts as high as 21 mph.
Sunday Night
Mostly clear, with a low around 21. North northwest wind 6 to 8 mph.
Monday
Sunny, with a high near 40. North northwest 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:
7:26 am CST Feb 17, 2026
Forecast Valid:
9am CST Feb 17, 2026-6pm CST Feb 23, 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