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.

Overcast

30°F

-1°C

Humidity 82%
Wind Speed S 7 mph
Barometer 30.18 in (1022.5 mb)
Dewpoint 25°F (-4°C)
Visibility 9.00 mi
Wind Chill23°F (-5°C)
Last update 3 Dec 9:52 am CST
Extended Forecast for

3 Miles SW Vergennes IL

  • Today

    Today: Cloudy, with a high near 36. South southwest wind 6 to 10 mph.

    High: 36 °F

    Cloudy

  • Tonight

    Tonight: Cloudy, with a low around 20. Light and variable wind becoming north northwest 6 to 11 mph after midnight.

    Low: 20 °F

    Cloudy

  • Thursday

    Thursday: Cloudy through mid morning, then gradual clearing, with a high near 29. North wind 6 to 11 mph.

    High: 29 °F

    Gradual
    Clearing

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 18. Calm wind.

    Low: 18 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 41. Calm wind becoming south southwest around 6 mph in the morning.

    High: 41 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 26. Light southwest wind.

    Low: 26 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 43. Calm wind becoming west around 5 mph.

    High: 43 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 27. Calm wind becoming northeast around 5 mph after midnight.

    Low: 27 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 42. North wind 5 to 7 mph.

    High: 42 °F

    Partly Sunny

Detailed Forecast

Today
Cloudy, with a high near 36. South southwest wind 6 to 10 mph.
Tonight
Cloudy, with a low around 20. Light and variable wind becoming north northwest 6 to 11 mph after midnight.
Thursday
Cloudy through mid morning, then gradual clearing, with a high near 29. North wind 6 to 11 mph.
Thursday Night
Mostly cloudy, with a low around 18. Calm wind.
Friday
Mostly sunny, with a high near 41. Calm wind becoming south southwest around 6 mph in the morning.
Friday Night
Partly cloudy, with a low around 26. Light southwest wind.
Saturday
Partly sunny, with a high near 43. Calm wind becoming west around 5 mph.
Saturday Night
Mostly cloudy, with a low around 27. Calm wind becoming northeast around 5 mph after midnight.
Sunday
Partly sunny, with a high near 42. North wind 5 to 7 mph.
Sunday Night
Mostly cloudy, with a low around 25. North northwest wind around 6 mph.
Monday
Partly sunny, with a high near 38. North northwest wind 5 to 7 mph becoming south in the afternoon.
Monday Night
Partly cloudy, with a low around 27. South southwest wind 3 to 7 mph.
Tuesday
Mostly sunny, with a high near 47. Southwest wind 7 to 10 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:
10:16 am CST Dec 3, 2025
Forecast Valid:
10am CST Dec 3, 2025-6pm CST Dec 9, 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