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.

Fog/Mist

48°F

9°C

Humidity 93%
Wind Speed S 14 mph
Barometer 29.98 in (1015.2 mb)
Dewpoint 46°F (8°C)
Visibility 6.00 mi
Wind Chill42°F (6°C)
Last update 17 Feb 9:52 am CST
Extended Forecast for

Carbondale IL

  • Today

    Today: Mostly cloudy, with a high near 64. South wind 13 to 16 mph, with gusts as high as 25 mph.

    High: 64 °F

    Mostly Cloudy

  • Tonight

    Tonight: A slight chance of showers between 1am and 4am. Mostly cloudy, with a steady temperature around 59. Breezy, with a south wind 16 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.

    Low: 59 °F

    Breezy.
    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: Partly sunny, with a high near 73. Southwest wind 8 to 16 mph, with gusts as high as 26 mph.

    High: 73 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers after midnight. Partly cloudy, with a low around 56. South wind around 6 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
Mostly cloudy, with a high near 64. South wind 13 to 16 mph, with gusts as high as 25 mph.
Tonight
A slight chance of showers between 1am and 4am. Mostly cloudy, with a steady temperature around 59. Breezy, with a south wind 16 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.
Wednesday
Partly sunny, with a high near 73. Southwest wind 8 to 16 mph, with gusts as high as 26 mph.
Wednesday Night
A 30 percent chance of showers after midnight. Partly cloudy, with a low around 56. South wind around 6 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:
10:17 am CST Feb 17, 2026
Forecast Valid:
10am CST Feb 17, 2026-6pm CST Feb 23, 2026
 
Forecast Discussion
 
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Additional Resources

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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