Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Partly Cloudy

68°F

20°C

Humidity 90%
Wind Speed Calm
Barometer 29.93 in (1013.0 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 21 Jun 12:52 am CDT
Extended Forecast for

3 Miles E Pinckneyville IL

Flood Watch June 21, 01:00pm until June 22, 07:00am
Click here for hazard details and duration
Flood Watch
  • Overnight

    Overnight: Partly cloudy, with a low around 66. Light and variable wind.

    Low: 66 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of showers and thunderstorms between 1pm and 5pm, then showers likely and possibly a thunderstorm after 5pm.  Partly sunny, with a high near 88. East southeast wind 5 to 10 mph becoming south 12 to 17 mph in the afternoon. Winds could gust as high as 26 mph.  Chance of precipitation is 60%.

    High: 88 °F

    Mostly Sunny
    then Showers
    Likely

  • Sunday Night

    Sunday Night: Showers and thunderstorms before 4am, then showers and possibly a thunderstorm between 4am and 5am, then a chance of showers and thunderstorms after 5am. Some of the storms could produce heavy rainfall.  Low around 69. South wind 9 to 16 mph becoming west southwest in the evening. Winds could gust as high as 23 mph.  Chance of precipitation is 100%.

    Low: 69 °F

    Heavy Rain
    then Showers

  • Monday

    Monday: A chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm.  Cloudy, then gradually becoming mostly sunny, with a high near 80. West wind 8 to 10 mph becoming north northwest in the afternoon.  Chance of precipitation is 30%.

    High: 80 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 61. North wind 5 to 9 mph becoming calm  in the evening.

    Low: 61 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 82. Calm wind.

    High: 82 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 62. Calm wind.

    Low: 62 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 85. Light and variable wind.

    High: 85 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 63. Light and variable wind.

    Low: 63 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 66. Light and variable wind.
Sunday
A chance of showers and thunderstorms between 1pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Partly sunny, with a high near 88. East southeast wind 5 to 10 mph becoming south 12 to 17 mph in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 60%.
Sunday Night
Showers and thunderstorms before 4am, then showers and possibly a thunderstorm between 4am and 5am, then a chance of showers and thunderstorms after 5am. Some of the storms could produce heavy rainfall. Low around 69. South wind 9 to 16 mph becoming west southwest in the evening. Winds could gust as high as 23 mph. Chance of precipitation is 100%.
Monday
A chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 80. West wind 8 to 10 mph becoming north northwest in the afternoon. Chance of precipitation is 30%.
Monday Night
Partly cloudy, with a low around 61. North wind 5 to 9 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 82. Calm wind.
Tuesday Night
Partly cloudy, with a low around 62. Calm wind.
Wednesday
Mostly sunny, with a high near 85. Light and variable wind.
Wednesday Night
Partly cloudy, with a low around 63. Light and variable wind.
Thursday
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84. Calm wind becoming west northwest around 5 mph in the afternoon.
Thursday Night
A slight chance of showers. Partly cloudy, with a low around 63. Light north wind.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 85. Light and variable wind.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Light south wind.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 87. Light south wind becoming south southwest 5 to 9 mph in the morning.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles E Pinckneyville IL
 38.08°N 89.32°W
12:56 am CDT Jun 21, 2026
1am CDT Jun 21, 2026-6pm CDT Jun 27, 2026
 
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