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.

Mostly Cloudy

65°F

18°C

Humidity 81%
Wind Speed SW 10 mph
Barometer 29.93 in (1013.2 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 7 Mar 2:52 pm CST
Extended Forecast for

3 Miles SW Vergennes IL

  • This Afternoon

    This Afternoon: A 40 percent chance of showers, mainly before 4pm. Mostly cloudy, with a steady temperature around 60. West wind 8 to 11 mph, with gusts as high as 21 mph.

    High: 60 °F

    Chance
    Showers

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 39. Northwest wind 6 to 11 mph becoming light after midnight.

    Low: 39 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 65. Calm wind becoming southwest 5 to 7 mph in the morning.

    High: 65 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 46. South southwest wind 6 to 8 mph.

    Low: 46 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 74. South southwest wind 8 to 16 mph, with gusts as high as 24 mph.

    High: 74 °F

    Sunny

  • Monday Night

    Monday Night: A slight chance of showers between midnight and 3am, then a slight chance of showers and thunderstorms after 3am. Partly cloudy, with a low around 61. South southwest wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.

    Low: 61 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 79. South southwest wind 10 to 17 mph, with gusts as high as 26 mph.

    High: 79 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Cloudy, with a low around 60. Breezy, with a south southwest wind 18 to 23 mph, with gusts as high as 29 mph.

    Low: 60 °F

    Showers and
    Breezy

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. Cloudy, with a high near 71. Breezy, with a south southwest wind 18 to 20 mph becoming northwest in the afternoon. Winds could gust as high as 29 mph.

    High: 71 °F

    Showers and
    Breezy

Detailed Forecast

This Afternoon
A 40 percent chance of showers, mainly before 4pm. Mostly cloudy, with a steady temperature around 60. West wind 8 to 11 mph, with gusts as high as 21 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 39. Northwest wind 6 to 11 mph becoming light after midnight.
Sunday
Sunny, with a high near 65. Calm wind becoming southwest 5 to 7 mph in the morning.
Sunday Night
Clear, with a low around 46. South southwest wind 6 to 8 mph.
Monday
Sunny, with a high near 74. South southwest wind 8 to 16 mph, with gusts as high as 24 mph.
Monday Night
A slight chance of showers between midnight and 3am, then a slight chance of showers and thunderstorms after 3am. Partly cloudy, with a low around 61. South southwest wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Tuesday
A 40 percent chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 79. South southwest wind 10 to 17 mph, with gusts as high as 26 mph.
Tuesday Night
Showers and possibly a thunderstorm. Cloudy, with a low around 60. Breezy, with a south southwest wind 18 to 23 mph, with gusts as high as 29 mph.
Wednesday
Showers and possibly a thunderstorm. Cloudy, with a high near 71. Breezy, with a south southwest wind 18 to 20 mph becoming northwest in the afternoon. Winds could gust as high as 29 mph.
Wednesday Night
A chance of showers before midnight. Partly cloudy, with a low around 34. Breezy, with a northwest wind 17 to 20 mph, with gusts as high as 26 mph.
Thursday
Sunny, with a high near 55. Northwest wind 7 to 16 mph becoming west southwest in the afternoon. Winds could gust as high as 21 mph.
Thursday Night
Partly cloudy, with a low around 40. South wind 6 to 15 mph, with gusts as high as 24 mph.
Friday
Partly sunny, with a high near 67. Breezy, with a southwest wind 14 to 20 mph, with gusts as high as 28 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:
2:07 pm CST Mar 7, 2026
Forecast Valid:
3pm CST Mar 7, 2026-6pm CDT Mar 13, 2026
 
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Additional Resources

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Chance of Precipitation