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

84°F

29°C

Humidity 62%
Wind Speed NW 14 mph
Barometer 30.04 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 17 Aug 2:52 pm CDT
Extended Forecast for

Carbondale IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a steady temperature around 84. North northwest wind 8 to 10 mph.

    High: 84 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 64. North northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 64 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 88. Calm wind.

    High: 88 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms after 2am. Increasing clouds, with a low around 69. Light south wind.

    Low: 69 °F

    Mostly Clear
    then Chance
    T-storms

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm before 1pm. Partly sunny, with a high near 87. Light and variable wind becoming south southeast around 6 mph. Chance of precipitation is 60%.

    High: 87 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 68. Light and variable wind. Chance of precipitation is 80%.

    Low: 68 °F

    Showers

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 60%.

    High: 84 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 65. Calm wind.

    Low: 65 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 85. Calm wind becoming north around 5 mph in the afternoon.

    High: 85 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a steady temperature around 84. North northwest wind 8 to 10 mph.
Tonight
Mostly clear, with a low around 64. North northwest wind 5 to 7 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 88. Calm wind.
Tuesday Night
A 40 percent chance of showers and thunderstorms after 2am. Increasing clouds, with a low around 69. Light south wind.
Wednesday
Showers likely and possibly a thunderstorm before 1pm. Partly sunny, with a high near 87. Light and variable wind becoming south southeast around 6 mph. Chance of precipitation is 60%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 68. Light and variable wind. Chance of precipitation is 80%.
Thursday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 60%.
Thursday Night
Partly cloudy, with a low around 65. Calm wind.
Friday
Sunny, with a high near 85. Calm wind becoming north around 5 mph in the afternoon.
Friday Night
A slight chance of showers before 1am. Mostly clear, with a low around 66. Calm wind.
Saturday
Sunny, with a high near 86. Calm wind becoming northwest 5 to 8 mph in the morning.
Saturday Night
Mostly clear, with a low around 65. North wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 83. Calm wind becoming north around 6 mph in the morning.
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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:
2:11 pm CDT Aug 17, 2026
Forecast Valid:
3pm CDT Aug 17, 2026-6pm CDT Aug 23, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation