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.

Mostly Cloudy

79°F

26°C

Humidity 72%
Wind Speed SW 14 G 24 mph
Barometer 29.98 in (1014.9 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 18 May 8:52 am CDT
Extended Forecast for

4 Miles S Carbondale IL

  • Today

    Today: Showers and thunderstorms likely, mainly after 1pm. Mostly cloudy, with a high near 85. South southwest wind 13 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 70%.

    High: 85 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 71. South wind 10 to 13 mph, with gusts as high as 23 mph.

    Low: 71 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Tuesday

    Tuesday: A chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms likely after 4pm. Increasing clouds, with a high near 87. South southwest wind 11 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.

    High: 87 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 1am, then showers between 1am and 4am, then showers and possibly a thunderstorm after 4am. Low around 62. Light and variable wind becoming north northwest 5 to 8 mph after midnight. Chance of precipitation is 90%.

    Low: 62 °F

    T-storms then
    Showers

  • Wednesday

    Wednesday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 73. North wind around 9 mph. Chance of precipitation is 50%.

    High: 73 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 55. North northeast wind 6 to 9 mph.

    Low: 55 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Partly sunny, with a high near 75. East northeast wind around 7 mph.

    High: 75 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 60. East northeast wind 5 to 7 mph.

    Low: 60 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 77. East wind around 6 mph becoming south southwest in the afternoon.

    High: 77 °F

    Showers
    Likely

Detailed Forecast

Today
Showers and thunderstorms likely, mainly after 1pm. Mostly cloudy, with a high near 85. South southwest wind 13 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 70%.
Tonight
A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 71. South wind 10 to 13 mph, with gusts as high as 23 mph.
Tuesday
A chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms likely after 4pm. Increasing clouds, with a high near 87. South southwest wind 11 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.
Tuesday Night
Showers and possibly a thunderstorm before 1am, then showers between 1am and 4am, then showers and possibly a thunderstorm after 4am. Low around 62. Light and variable wind becoming north northwest 5 to 8 mph after midnight. Chance of precipitation is 90%.
Wednesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 73. North wind around 9 mph. Chance of precipitation is 50%.
Wednesday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 55. North northeast wind 6 to 9 mph.
Thursday
Partly sunny, with a high near 75. East northeast wind around 7 mph.
Thursday Night
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 60. East northeast wind 5 to 7 mph.
Friday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 77. East wind around 6 mph becoming south southwest in the afternoon.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. South wind around 5 mph becoming calm in the evening.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 81. Calm wind becoming southwest around 6 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 63. Light south southwest wind.
Sunday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 85. Calm wind becoming south around 6 mph in the afternoon.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Carbondale IL
 37.68°N 89.2°W
Last Update:
8:11 am CDT May 18, 2026
Forecast Valid:
9am CDT May 18, 2026-6pm CDT May 24, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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