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

54°F

12°C

Humidity 35%
Wind Speed SE 7 mph
Barometer 30.21 in (1023.3 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 12 Feb 3:52 pm CST
Extended Forecast for

3 Miles SW Vergennes IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a steady temperature around 50. Southeast wind 3 to 5 mph.

    High: 50 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 31. Light southeast wind.

    Low: 31 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 57. Calm wind becoming south 5 to 7 mph in the morning.

    High: 57 °F

    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 37. Light south wind.

    Low: 37 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Showers, mainly after noon. High near 53. Calm wind becoming southeast 5 to 7 mph in the morning. Chance of precipitation is 80%.

    High: 53 °F

    Chance
    Showers then
    Showers

  • Saturday Night

    Saturday Night: Showers. Low around 45. East wind around 8 mph. Chance of precipitation is 90%.

    Low: 45 °F

    Showers

  • Sunday

    Sunday: A 40 percent chance of showers before noon. Partly sunny, with a high near 57. North northeast wind 8 to 11 mph.

    High: 57 °F

    Chance
    Showers then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 37. North wind 5 to 7 mph becoming calm in the evening.

    Low: 37 °F

    Mostly Clear

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 61. Calm wind becoming south southeast around 6 mph in the morning.

    High: 61 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a steady temperature around 50. Southeast wind 3 to 5 mph.
Tonight
Mostly clear, with a low around 31. Light southeast wind.
Friday
Sunny, with a high near 57. Calm wind becoming south 5 to 7 mph in the morning.
Friday Night
Increasing clouds, with a low around 37. Light south wind.
Saturday
Showers, mainly after noon. High near 53. Calm wind becoming southeast 5 to 7 mph in the morning. Chance of precipitation is 80%.
Saturday Night
Showers. Low around 45. East wind around 8 mph. Chance of precipitation is 90%.
Sunday
A 40 percent chance of showers before noon. Partly sunny, with a high near 57. North northeast wind 8 to 11 mph.
Sunday Night
Mostly clear, with a low around 37. North wind 5 to 7 mph becoming calm in the evening.
Washington's Birthday
Mostly sunny, with a high near 61. Calm wind becoming south southeast around 6 mph in the morning.
Monday Night
Mostly cloudy, with a low around 45. South wind around 6 mph.
Tuesday
Mostly cloudy, with a high near 65. South wind 7 to 16 mph, with gusts as high as 24 mph.
Tuesday Night
Mostly cloudy, with a low around 56. South southwest wind 15 to 18 mph, with gusts as high as 28 mph.
Wednesday
Mostly cloudy, with a high near 70. South southwest wind 14 to 18 mph, with gusts as high as 26 mph.
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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:
3:21 pm CST Feb 12, 2026
Forecast Valid:
4pm CST Feb 12, 2026-6pm CST Feb 18, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation