National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

47°F

8°C

Humidity 42%
Wind Speed S 18 G 30 mph
Barometer 29.94 in (1013.9 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 13 Mar 1:52 am CDT
Extended Forecast for

Vergennes IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 42. Breezy, with a south southwest wind 14 to 20 mph, with gusts as high as 28 mph.

    Low: 42 °F

    Mostly Cloudy
    and Breezy

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 64. Breezy, with a southwest wind 13 to 20 mph becoming west northwest in the afternoon. Winds could gust as high as 33 mph.

    High: 64 °F

    Partly Sunny
    and Breezy
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 37. Northwest wind around 6 mph becoming light and variable.

    Low: 37 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 67. East wind 7 to 13 mph becoming south in the afternoon. Winds could gust as high as 18 mph.

    High: 67 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 55. South southeast wind 9 to 14 mph, with gusts as high as 24 mph.

    Low: 55 °F

    Partly Cloudy

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm, mainly after 4pm. Mostly cloudy, with a high near 72. Breezy, with a south wind 18 to 26 mph, with gusts as high as 40 mph. Chance of precipitation is 70%.

    High: 72 °F

    Breezy.
    Mostly Cloudy
    then Showers
    Likely

  • Sunday Night

    Sunday Night: Rain showers before 1am, then a chance of rain and snow showers between 1am and 4am, then a chance of snow showers after 4am. Some thunder is also possible. Low around 26. Blustery, with a south southwest wind 22 to 25 mph becoming west northwest after midnight. Winds could gust as high as 39 mph. Chance of precipitation is 90%.

    Low: 26 °F

    Showers and
    Breezy then
    Rain/Snow and
    Blustery

  • Monday

    Monday: A slight chance of snow showers before 1pm. Partly sunny, with a high near 32. Breezy, with a west northwest wind 22 to 24 mph, with gusts as high as 38 mph.

    High: 32 °F

    Slight Chance
    Snow Showers
    and Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 15. Blustery, with a northwest wind 10 to 20 mph, with gusts as high as 28 mph.

    Low: 15 °F

    Mostly Clear
    and Blustery
    then Mostly
    Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 42. Breezy, with a south southwest wind 14 to 20 mph, with gusts as high as 28 mph.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 64. Breezy, with a southwest wind 13 to 20 mph becoming west northwest in the afternoon. Winds could gust as high as 33 mph.
Friday Night
Mostly clear, with a low around 37. Northwest wind around 6 mph becoming light and variable.
Saturday
Mostly sunny, with a high near 67. East wind 7 to 13 mph becoming south in the afternoon. Winds could gust as high as 18 mph.
Saturday Night
Partly cloudy, with a low around 55. South southeast wind 9 to 14 mph, with gusts as high as 24 mph.
Sunday
Showers likely and possibly a thunderstorm, mainly after 4pm. Mostly cloudy, with a high near 72. Breezy, with a south wind 18 to 26 mph, with gusts as high as 40 mph. Chance of precipitation is 70%.
Sunday Night
Rain showers before 1am, then a chance of rain and snow showers between 1am and 4am, then a chance of snow showers after 4am. Some thunder is also possible. Low around 26. Blustery, with a south southwest wind 22 to 25 mph becoming west northwest after midnight. Winds could gust as high as 39 mph. Chance of precipitation is 90%.
Monday
A slight chance of snow showers before 1pm. Partly sunny, with a high near 32. Breezy, with a west northwest wind 22 to 24 mph, with gusts as high as 38 mph.
Monday Night
Mostly clear, with a low around 15. Blustery, with a northwest wind 10 to 20 mph, with gusts as high as 28 mph.
Tuesday
Mostly sunny, with a high near 38. Northwest wind around 9 mph.
Tuesday Night
Mostly cloudy, with a low around 27. South southeast wind 6 to 11 mph, with gusts as high as 18 mph.
Wednesday
Mostly cloudy, with a high near 57. South southwest wind 11 to 14 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 40. South southwest wind 6 to 8 mph.
Thursday
Sunny, with a high near 69. South southwest wind 6 to 9 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Vergennes IL
 37.9°N 89.33°W
Last Update:
1:46 am CDT Mar 13, 2026
Forecast Valid:
2am CDT Mar 13, 2026-6pm CDT Mar 19, 2026
 
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Additional Resources

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Chance of Precipitation