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.

Fair

72°F

22°C

Humidity 71%
Wind Speed Calm
Barometer 30.10 in (1019.1 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 29 Sep 6:52 pm CDT
Extended Forecast for

3 Miles SW Vergennes IL

  • Tonight

    Tonight: Clear, with a low around 61. Light and variable wind.

    Low: 61 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 89. Calm wind becoming northeast 5 to 8 mph in the morning.

    High: 89 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 59. Northeast wind around 5 mph becoming calm in the evening.

    Low: 59 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 87. Calm wind becoming east 5 to 7 mph in the morning.

    High: 87 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 62. East wind around 5 mph becoming calm in the evening.

    Low: 62 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 86. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 86 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 61. Light south southeast wind.

    Low: 61 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 86. Calm wind becoming south around 6 mph in the morning.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 60. South wind 3 to 5 mph.

    Low: 60 °F

    Clear

Detailed Forecast

Tonight
Clear, with a low around 61. Light and variable wind.
Tuesday
Sunny, with a high near 89. Calm wind becoming northeast 5 to 8 mph in the morning.
Tuesday Night
Partly cloudy, with a low around 59. Northeast wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 87. Calm wind becoming east 5 to 7 mph in the morning.
Wednesday Night
Mostly cloudy, with a low around 62. East wind around 5 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 86. Calm wind becoming southeast around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 61. Light south southeast wind.
Friday
Sunny, with a high near 86. Calm wind becoming south around 6 mph in the morning.
Friday Night
Clear, with a low around 60. South wind 3 to 5 mph.
Saturday
Sunny, with a high near 85. South wind 3 to 8 mph.
Saturday Night
Mostly clear, with a low around 59. South southeast wind 3 to 6 mph.
Sunday
Sunny, with a high near 85. South wind 5 to 9 mph.
Sunday Night
Mostly clear, with a low around 61. South southeast wind 3 to 5 mph.
Monday
Sunny, with a high near 86. South wind 3 to 7 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Vergennes IL
 37.86°N 89.39°W
Last Update:
4:30 pm CDT Sep 29, 2025
Forecast Valid:
6pm CDT Sep 29, 2025-6pm CDT Oct 6, 2025
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation