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

37°F

3°C

Humidity 73%
Wind Speed Calm
Barometer 30.01 in (1016.6 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 31 Dec 5:52 pm CST
Extended Forecast for

3 Miles SW Vergennes IL

  • Tonight

    Tonight: Mostly cloudy during the early evening, then gradual clearing, with a low around 28. West southwest wind around 6 mph becoming light and variable after midnight.

    Low: 28 °F

    Gradual
    Clearing

  • New Year's Day

    New Year's Day: Partly sunny, with a high near 41. North northeast wind around 5 mph becoming calm in the afternoon.

    High: 41 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 30. Calm wind.

    Low: 30 °F

    Mostly Cloudy

  • Friday

    Friday: Cloudy, with a high near 44. Calm wind becoming east northeast around 6 mph in the morning.

    High: 44 °F

    Cloudy

  • Friday Night

    Friday Night: A 20 percent chance of showers. Cloudy, with a low around 30. Northeast wind around 6 mph.

    Low: 30 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 43. North wind around 7 mph.

    High: 43 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 26. North northwest wind around 5 mph becoming calm in the evening.

    Low: 26 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 44. Calm wind becoming east around 5 mph in the afternoon.

    High: 44 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 34. East southeast wind 5 to 9 mph becoming south after midnight.

    Low: 34 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy during the early evening, then gradual clearing, with a low around 28. West southwest wind around 6 mph becoming light and variable after midnight.
New Year's Day
Partly sunny, with a high near 41. North northeast wind around 5 mph becoming calm in the afternoon.
Thursday Night
Mostly cloudy, with a low around 30. Calm wind.
Friday
Cloudy, with a high near 44. Calm wind becoming east northeast around 6 mph in the morning.
Friday Night
A 20 percent chance of showers. Cloudy, with a low around 30. Northeast wind around 6 mph.
Saturday
Partly sunny, with a high near 43. North wind around 7 mph.
Saturday Night
Mostly clear, with a low around 26. North northwest wind around 5 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 44. Calm wind becoming east around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 34. East southeast wind 5 to 9 mph becoming south after midnight.
Monday
Sunny, with a high near 55. South southwest wind 8 to 11 mph, with gusts as high as 18 mph.
Monday Night
Mostly cloudy, with a low around 42. South wind around 7 mph.
Tuesday
Mostly sunny, with a high near 61. Southwest wind 6 to 8 mph.
Tuesday Night
Partly cloudy, with a low around 38. Southwest wind around 6 mph becoming northwest after midnight.
Wednesday
Mostly sunny, with a high near 55. Northwest wind around 7 mph becoming south in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Vergennes IL
 37.86°N 89.39°W
Last Update:
3:16 pm CST Dec 31, 2025
Forecast Valid:
6pm CST Dec 31, 2025-6pm CST Jan 7, 2026
 
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