Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Fair

59°F

15°C

Humidity 96%
Wind Speed Calm
Barometer 30.00 in (1016.3 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 4 Mar 5:56 pm CST
Extended Forecast for

3 Miles SE Dahlgren IL

Flood Watch until March 5, 12:00pm
Severe T-storm Watch until March 4, 09:00pm
Click here for hazard details and duration
Flood Watch
...
  •  
    Flood Watch until March 5, 12:00pm
    Severe T-storm Watch until March 4, 09:00pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Tonight

    Low: 59 °F

    Severe
    Thunderstorms
    then Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm, mainly before 11am, then a chance of showers and thunderstorms after 11am.  High near 69. South southwest wind 6 to 11 mph, with gusts as high as 18 mph.  Chance of precipitation is 90%.

    High: 69 °F

    Showers then
    Chance
    Showers

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms after midnight.  Mostly cloudy, with a low around 59. Light and variable wind becoming south around 6 mph after midnight.  Chance of precipitation is 60%.

    Low: 59 °F

    Showers
    Likely then
    Chance
    T-storms

  • Friday

    Friday: A slight chance of showers and thunderstorms before 9am, then a slight chance of showers between 9am and noon, then a slight chance of showers and thunderstorms after noon.  Partly sunny, with a high near 77. South wind 7 to 15 mph, with gusts as high as 23 mph.  Chance of precipitation is 20%.

    High: 77 °F

    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers, then showers likely and possibly a thunderstorm after midnight.  Mostly cloudy, with a low around 61. South wind 10 to 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 70%.

    Low: 61 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Saturday

    Saturday: Showers and possibly a thunderstorm.  High near 68. South southwest wind 8 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph.  Chance of precipitation is 80%.

    High: 68 °F

    Showers then
    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 43. Northwest wind 5 to 7 mph becoming calm  in the evening.

    Low: 43 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 62. Calm wind becoming west around 5 mph.

    High: 62 °F

    Mostly Sunny

Detailed Forecast

Tonight
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1am. Some of the storms could be severe. Low around 59. South southwest wind 3 to 8 mph. Chance of precipitation is 90%.
Thursday
Showers and possibly a thunderstorm, mainly before 11am, then a chance of showers and thunderstorms after 11am. High near 69. South southwest wind 6 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 90%.
Thursday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 59. Light and variable wind becoming south around 6 mph after midnight. Chance of precipitation is 60%.
Friday
A slight chance of showers and thunderstorms before 9am, then a slight chance of showers between 9am and noon, then a slight chance of showers and thunderstorms after noon. Partly sunny, with a high near 77. South wind 7 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Friday Night
A slight chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 61. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
Saturday
Showers and possibly a thunderstorm. High near 68. South southwest wind 8 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 80%.
Saturday Night
Mostly cloudy, with a low around 43. Northwest wind 5 to 7 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 62. Calm wind becoming west around 5 mph.
Sunday Night
Mostly clear, with a low around 48. Calm wind becoming south southwest around 5 mph after midnight.
Monday
A slight chance of showers and thunderstorms after noon. Sunny, with a high near 74. South southwest wind 5 to 11 mph, with gusts as high as 18 mph.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 61. South southwest wind 8 to 11 mph, with gusts as high as 21 mph.
Tuesday
Showers and thunderstorms likely. Mostly cloudy, with a high near 76. South southwest wind 11 to 17 mph, with gusts as high as 25 mph.
Tuesday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 52. South southwest wind 15 to 17 mph, with gusts as high as 28 mph.
Wednesday
Showers likely. Mostly cloudy, with a high near 61. Southwest wind 14 to 17 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Dahlgren IL
 38.17°N 88.64°W
4:26 pm CST Mar 4, 2026
6pm CST Mar 4, 2026-6pm CDT Mar 11, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database