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.

Overcast

75°F

24°C

Humidity 96%
Wind Speed S 8 mph
Barometer 29.93 in (1012.9 mb)
Dewpoint 74°F (23°C)
Visibility 7.00 mi
Last update 27 Jun 12:52 am CDT
Extended Forecast for

Carbondale IL

Flood Watch June 27, 01:05am until June 28, 07:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch June 27, 01:05am until June 28, 07:00am

    NOW until 7:00am Sun

    Flood Watch

  • Overnight

    Low: 74 °F

    Showers

  • Saturday

    Saturday: Showers and thunderstorms likely, mainly before 2pm. Mostly cloudy, with a high near 85. Southwest wind 5 to 7 mph. Chance of precipitation is 70%.

    High: 85 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 73. South southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.

    Low: 73 °F

    Chance
    T-storms

  • Sunday

    Sunday: Sunny, with a high near 93. Heat index values as high as 107. Light south wind becoming south southwest 5 to 10 mph in the morning.

    High: 93 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 75. South wind 5 to 8 mph.

    Low: 75 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 95. South southwest wind 5 to 9 mph.

    High: 95 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 76. South wind 5 to 7 mph becoming calm after midnight.

    Low: 76 °F

    Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 97. Calm wind becoming south around 6 mph in the afternoon.

    High: 97 °F

    Hot

Detailed Forecast

Overnight
Showers and possibly a thunderstorm. Steady temperature around 74. Southwest wind around 5 mph. Chance of precipitation is 80%.
Saturday
Showers and thunderstorms likely, mainly before 2pm. Mostly cloudy, with a high near 85. Southwest wind 5 to 7 mph. Chance of precipitation is 70%.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 73. South southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.
Sunday
Sunny, with a high near 93. Heat index values as high as 107. Light south wind becoming south southwest 5 to 10 mph in the morning.
Sunday Night
Clear, with a low around 75. South wind 5 to 8 mph.
Monday
Sunny, with a high near 95. South southwest wind 5 to 9 mph.
Monday Night
Clear, with a low around 76. South wind 5 to 7 mph becoming calm after midnight.
Tuesday
Sunny and hot, with a high near 97. Calm wind becoming south around 6 mph in the afternoon.
Tuesday Night
Clear, with a low around 76. South wind around 5 mph becoming calm in the evening.
Wednesday
Sunny and hot, with a high near 98. Light and variable wind.
Wednesday Night
Mostly clear, with a low around 77. Light and variable wind.
Thursday
Sunny and hot, with a high near 97. Light and variable wind.
Thursday Night
Mostly clear, with a low around 77. Calm wind.
Friday
A slight chance of showers and thunderstorms. Sunny, with a high near 96. Light and variable wind.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Carbondale IL
 37.72°N 89.23°W
Last Update:
11:26 pm CDT Jun 26, 2026
Forecast Valid:
1am CDT Jun 27, 2026-6pm CDT Jul 3, 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