Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

A Few Clouds

84°F

29°C

Humidity 59%
Wind Speed SW 20 G 40 mph
Barometer 29.61 in (1002.3 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 17 Jun 11:52 am CDT
Extended Forecast for

4 Miles NNW Vergennes IL

Wind Advisory June 17, 01:00pm until June 17, 08:00pm
Click here for hazard details and duration
Wind Advisory
  • This Afternoon

    This Afternoon: Sunny, with a high near 90. Breezy, with a south southwest wind 23 to 29 mph, with gusts as high as 39 mph.

    High: 90 °F

    Sunny and
    Breezy

  • Tonight

    Tonight: Showers and thunderstorms, mainly before 3am.  Low around 70. Breezy, with a west southwest wind 17 to 22 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 34 mph.  Chance of precipitation is 80%.

    Low: 70 °F

    Showers and
    Breezy

  • Thursday

    Thursday: A chance of showers between 9am and 10am.  Increasing clouds, with a high near 85. West wind 5 to 7 mph becoming north northwest in the afternoon.  Chance of precipitation is 30%.

    High: 85 °F

    Chance
    Showers then
    Mostly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before 1am.  Mostly cloudy, with a low around 62. North northwest wind around 6 mph becoming calm  in the evening.

    Low: 62 °F

    Slight Chance
    Showers

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 84. Calm wind becoming north northwest around 5 mph in the afternoon.

    High: 84 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 62. Light north wind.

    Low: 62 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 87. Calm wind becoming south around 5 mph in the afternoon.

    High: 87 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms after 1am.  Partly cloudy, with a low around 67. South wind 3 to 6 mph.

    Low: 67 °F

    Mostly Clear
    then Chance
    T-storms

  • Sunday

    Sunday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm.  Mostly cloudy, with a high near 87. South southwest wind 7 to 17 mph, with gusts as high as 25 mph.

    High: 87 °F

    Chance
    T-storms then
    Showers
    Likely

Detailed Forecast

This Afternoon
Sunny, with a high near 90. Breezy, with a south southwest wind 23 to 29 mph, with gusts as high as 39 mph.
Tonight
Showers and thunderstorms, mainly before 3am. Low around 70. Breezy, with a west southwest wind 17 to 22 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 34 mph. Chance of precipitation is 80%.
Thursday
A chance of showers between 9am and 10am. Increasing clouds, with a high near 85. West wind 5 to 7 mph becoming north northwest in the afternoon. Chance of precipitation is 30%.
Thursday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 62. North northwest wind around 6 mph becoming calm in the evening.
Juneteenth
Mostly sunny, with a high near 84. Calm wind becoming north northwest around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 62. Light north wind.
Saturday
Mostly sunny, with a high near 87. Calm wind becoming south around 5 mph in the afternoon.
Saturday Night
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 67. South wind 3 to 6 mph.
Sunday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 87. South southwest wind 7 to 17 mph, with gusts as high as 25 mph.
Sunday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 68. West southwest wind 10 to 14 mph, with gusts as high as 20 mph.
Monday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 83. West wind around 11 mph becoming north in the afternoon. Winds could gust as high as 18 mph.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 63. North wind 5 to 10 mph becoming light north northeast after midnight.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 83. North northeast wind 3 to 5 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNW Vergennes IL
 37.95°N 89.39°W
10:31 am CDT Jun 17, 2026
12pm CDT Jun 17, 2026-6pm CDT Jun 23, 2026
 
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Additional Resources

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