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.

Mostly Cloudy

81°F

27°C

Humidity 58%
Wind Speed S 17 G 28 mph
Barometer 29.95 in (1013.7 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 14 Apr 12:52 pm CDT
Extended Forecast for

Carbondale IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 87. South southwest wind 13 to 17 mph, with gusts as high as 28 mph.

    High: 87 °F

    Sunny

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between 3am and 4am. Increasing clouds, with a low around 70. South southwest wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.

    Low: 70 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: A slight chance of showers before 1pm, then a slight chance of showers and thunderstorms between 1pm and 5pm. Partly sunny, with a high near 84. South southwest wind 10 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.

    High: 84 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. South southwest wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    Low: 64 °F

    Chance
    Showers then
    Showers
    Likely

  • Thursday

    Thursday: Showers and possibly a thunderstorm before 10am, then showers between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. High near 82. Southwest wind 9 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.

    High: 82 °F

    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly clear, with a low around 62. South southwest wind 3 to 7 mph. Chance of precipitation is 30%.

    Low: 62 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Light south wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 21 mph.

    High: 87 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 64. South wind 9 to 11 mph, with gusts as high as 21 mph.

    Low: 64 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 76. South southwest wind 11 to 15 mph becoming west in the afternoon. Winds could gust as high as 25 mph.

    High: 76 °F

    Chance
    T-storms then
    Showers
    Likely

Detailed Forecast

This Afternoon
Sunny, with a high near 87. South southwest wind 13 to 17 mph, with gusts as high as 28 mph.
Tonight
A slight chance of showers and thunderstorms between 3am and 4am. Increasing clouds, with a low around 70. South southwest wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Wednesday
A slight chance of showers before 1pm, then a slight chance of showers and thunderstorms between 1pm and 5pm. Partly sunny, with a high near 84. South southwest wind 10 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. South southwest wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Thursday
Showers and possibly a thunderstorm before 10am, then showers between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. High near 82. Southwest wind 9 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.
Thursday Night
A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly clear, with a low around 62. South southwest wind 3 to 7 mph. Chance of precipitation is 30%.
Friday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Light south wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 21 mph.
Friday Night
A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 64. South wind 9 to 11 mph, with gusts as high as 21 mph.
Saturday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 76. South southwest wind 11 to 15 mph becoming west in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
A chance of showers, mainly before 1am. Partly cloudy, with a low around 42. West northwest wind 8 to 11 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 64. West northwest wind 7 to 11 mph, with gusts as high as 20 mph.
Sunday Night
Clear, with a low around 40. Northwest wind 5 to 7 mph becoming light and variable after midnight.
Monday
Sunny, with a high near 69. Southeast wind 3 to 7 mph.
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:
1:42 pm CDT Apr 14, 2026
Forecast Valid:
1pm CDT Apr 14, 2026-6pm CDT Apr 20, 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