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

65°F

18°C

Humidity 93%
Wind Speed Calm
Barometer 30.26 in (1024.6 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 3 Oct 7:52 am CDT
Extended Forecast for

Vergennes IL

  • Today

    Today: A slight chance of sprinkles after 4pm. Sunny, with a high near 89. South wind 3 to 8 mph.

    High: 89 °F

    Slight Chance
    Sprinkles

  • Tonight

    Tonight: A slight chance of sprinkles before 9pm. Mostly clear, with a low around 59. South wind around 5 mph becoming calm in the evening.

    Low: 59 °F

    Slight Chance
    Sprinkles

  • Saturday

    Saturday: Sunny, with a high near 86. Calm wind becoming south southeast 5 to 9 mph in the morning.

    High: 86 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 58. South southeast wind 3 to 5 mph.

    Low: 58 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 87. South wind 5 to 11 mph.

    High: 87 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 63. South southeast wind 3 to 6 mph.

    Low: 63 °F

    Mostly Clear

  • Monday

    Monday: A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 87. Calm wind becoming south around 6 mph in the morning.

    High: 87 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of showers after 1am. Partly cloudy, with a low around 63. Light south southeast wind.

    Low: 63 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 84. Calm wind becoming north around 6 mph in the morning.

    High: 84 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
A slight chance of sprinkles after 4pm. Sunny, with a high near 89. South wind 3 to 8 mph.
Tonight
A slight chance of sprinkles before 9pm. Mostly clear, with a low around 59. South wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 86. Calm wind becoming south southeast 5 to 9 mph in the morning.
Saturday Night
Clear, with a low around 58. South southeast wind 3 to 5 mph.
Sunday
Sunny, with a high near 87. South wind 5 to 11 mph.
Sunday Night
Mostly clear, with a low around 63. South southeast wind 3 to 6 mph.
Monday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 87. Calm wind becoming south around 6 mph in the morning.
Monday Night
A slight chance of showers after 1am. Partly cloudy, with a low around 63. Light south southeast wind.
Tuesday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 84. Calm wind becoming north around 6 mph in the morning.
Tuesday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 59. North northeast wind 5 to 7 mph.
Wednesday
Mostly sunny, with a high near 76. North northeast wind 8 to 11 mph.
Wednesday Night
Mostly clear, with a low around 51. Northeast wind around 7 mph.
Thursday
Sunny, with a high near 75. East northeast wind 6 to 8 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Vergennes IL
 37.9°N 89.33°W
Last Update:
8:31 am CDT Oct 3, 2025
Forecast Valid:
8am CDT Oct 3, 2025-6pm CDT Oct 9, 2025
 
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Additional Resources

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Chance of Precipitation