Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Thunderstorm Light Rain Fog/Mist

58°F

14°C

Humidity 97%
Wind Speed Calm
Barometer 30.00 in (1015.9 mb)
Dewpoint 57°F (14°C)
Visibility 5.00 mi
Last update 4 Mar 9:52 pm CST
Extended Forecast for

3 Miles SW Vergennes IL

Flood Watch until March 5, 12:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch until March 5, 12:00pm

    NOW until 12:00pm Thu

    Flood Watch

  • Tonight

    Low: 60 °F

    Showers and
    Patchy Fog

  • Thursday

    Thursday: Showers and thunderstorms, mainly before 9am.  Patchy fog before 10am. High near 71. South southeast wind 5 to 10 mph becoming west in the afternoon.  Chance of precipitation is 80%.

    High: 71 °F

    Showers and
    Patchy Fog
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms, mainly before 1am.  Widespread fog, mainly after 5am.  Otherwise, mostly cloudy, with a low around 59. Light and variable wind becoming south 5 to 8 mph after midnight.

    Low: 59 °F

    Chance
    T-storms then
    Chance
    Showers and
    Fog

  • Friday

    Friday: A 30 percent chance of showers after noon.  Areas of fog before 7am.  Otherwise, partly sunny, with a high near 77. South wind 8 to 18 mph, with gusts as high as 28 mph.

    High: 77 °F

    Areas Fog
    then Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of showers before 9pm, then a slight chance of showers and thunderstorms between 9pm and midnight, then showers likely and possibly a thunderstorm after midnight.  Mostly cloudy, with a low around 61. South wind 14 to 17 mph, with gusts as high as 25 mph.  Chance of precipitation is 70%.

    Low: 61 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: Showers likely, mainly before noon.  Mostly cloudy, with a high near 68. South southwest wind 8 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph.  Chance of precipitation is 70%.

    High: 68 °F

    Showers
    Likely then
    Chance
    Showers

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before midnight.  Mostly cloudy, with a low around 44. North wind 3 to 8 mph.

    Low: 44 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 64. Light and variable wind becoming south around 5 mph in the afternoon.

    High: 64 °F

    Mostly Sunny

Detailed Forecast

Tonight
Showers and possibly a thunderstorm. Patchy fog after midnight. Low around 60. South wind 6 to 10 mph. Chance of precipitation is 90%.
Thursday
Showers and thunderstorms, mainly before 9am. Patchy fog before 10am. High near 71. South southeast wind 5 to 10 mph becoming west in the afternoon. Chance of precipitation is 80%.
Thursday Night
A 40 percent chance of showers and thunderstorms, mainly before 1am. Widespread fog, mainly after 5am. Otherwise, mostly cloudy, with a low around 59. Light and variable wind becoming south 5 to 8 mph after midnight.
Friday
A 30 percent chance of showers after noon. Areas of fog before 7am. Otherwise, partly sunny, with a high near 77. South wind 8 to 18 mph, with gusts as high as 28 mph.
Friday Night
A slight chance of showers before 9pm, then a slight chance of showers and thunderstorms between 9pm and midnight, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 61. South wind 14 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
Saturday
Showers likely, mainly before noon. Mostly cloudy, with a high near 68. South southwest wind 8 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 70%.
Saturday Night
A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 44. North wind 3 to 8 mph.
Sunday
Mostly sunny, with a high near 64. Light and variable wind becoming south around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 49. South southwest wind around 6 mph.
Monday
A slight chance of showers and thunderstorms after noon. Sunny, with a high near 75. South southwest wind 6 to 13 mph, with gusts as high as 20 mph.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 61. South southwest wind 10 to 13 mph, with gusts as high as 21 mph.
Tuesday
Showers and thunderstorms likely. Mostly cloudy, with a high near 76. South southwest wind 14 to 18 mph, with gusts as high as 28 mph.
Tuesday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 52. South southwest wind around 18 mph, with gusts as high as 28 mph.
Wednesday
Showers likely. Mostly cloudy, with a high near 61. Southwest wind 15 to 17 mph becoming northwest in the afternoon. Winds could gust as high as 26 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Vergennes IL
 37.86°N 89.39°W
10:06 pm CST Mar 4, 2026
10pm CST Mar 4, 2026-6pm CDT Mar 11, 2026
 
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