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

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

A Few Clouds

72°F

22°C

Humidity 46%
Wind Speed S 9 mph
Barometer 29.95 in (1014.4 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 25 Mar 4:56 pm CDT
Extended Forecast for

3 Miles SW Dahlgren IL

  • Tonight

    Tonight: A slight chance of showers before 1am, then a slight chance of showers and thunderstorms between 1am and 2am. Partly cloudy, with a low around 61. South wind 9 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.

    Low: 61 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: Sunny, with a high near 85. South southwest wind 14 to 18 mph, with gusts as high as 26 mph.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm after 1am. Increasing clouds, with a low around 46. South southwest wind 14 to 17 mph becoming north after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 70%.

    Low: 46 °F

    Partly Cloudy
    then Showers
    Likely

  • Friday

    Friday: Showers likely and possibly a thunderstorm. Cloudy, then gradually becoming mostly sunny, with a high near 54. North wind 15 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.

    High: 54 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Mostly clear, with a low around 31. North wind 6 to 13 mph, with gusts as high as 21 mph.

    Low: 31 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 55. North wind around 6 mph becoming east in the afternoon.

    High: 55 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 38. East southeast wind 3 to 6 mph.

    Low: 38 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 65. South wind 6 to 11 mph, with gusts as high as 20 mph.

    High: 65 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 53. South southwest wind 8 to 11 mph, with gusts as high as 22 mph.

    Low: 53 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A slight chance of showers before 1am, then a slight chance of showers and thunderstorms between 1am and 2am. Partly cloudy, with a low around 61. South wind 9 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Thursday
Sunny, with a high near 85. South southwest wind 14 to 18 mph, with gusts as high as 26 mph.
Thursday Night
Showers likely and possibly a thunderstorm after 1am. Increasing clouds, with a low around 46. South southwest wind 14 to 17 mph becoming north after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 70%.
Friday
Showers likely and possibly a thunderstorm. Cloudy, then gradually becoming mostly sunny, with a high near 54. North wind 15 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.
Friday Night
Mostly clear, with a low around 31. North wind 6 to 13 mph, with gusts as high as 21 mph.
Saturday
Sunny, with a high near 55. North wind around 6 mph becoming east in the afternoon.
Saturday Night
Partly cloudy, with a low around 38. East southeast wind 3 to 6 mph.
Sunday
Mostly sunny, with a high near 65. South wind 6 to 11 mph, with gusts as high as 20 mph.
Sunday Night
Mostly cloudy, with a low around 53. South southwest wind 8 to 11 mph, with gusts as high as 22 mph.
Monday
A slight chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 76. South southwest wind 11 to 15 mph, with gusts as high as 23 mph.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 60. South southwest wind 9 to 13 mph, with gusts as high as 21 mph.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 78. South southwest wind 11 to 16 mph, with gusts as high as 23 mph.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. South southwest wind 11 to 13 mph, with gusts as high as 22 mph.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 77. South southwest wind 13 to 17 mph, with gusts as high as 25 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Dahlgren IL
 38.17°N 88.72°W
Last Update:
4:11 pm CDT Mar 25, 2026
Forecast Valid:
5pm CDT Mar 25, 2026-6pm CDT Apr 1, 2026
 
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Additional Resources

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Chance of Precipitation