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.

Fair

55°F

13°C

Humidity 96%
Wind Speed Calm
Barometer 30.17 in (1021.6 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 14 Oct 12:56 am CDT
Extended Forecast for

3 Miles SW Dahlgren IL

  • Overnight

    Overnight: Clear, with a steady temperature around 56. Calm wind.

    Low: 56 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 81. Calm wind becoming northeast 5 to 7 mph in the afternoon.

    High: 81 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 53. Calm wind.

    Low: 53 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 82. Calm wind becoming northeast around 6 mph in the afternoon.

    High: 82 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 56. Light east wind.

    Low: 56 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 79. Light east wind becoming east southeast 5 to 9 mph in the morning.

    High: 79 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 54. East southeast wind around 6 mph.

    Low: 54 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 82. South wind 5 to 10 mph.

    High: 82 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 62. South wind 6 to 8 mph.

    Low: 62 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a steady temperature around 56. Calm wind.
Tuesday
Sunny, with a high near 81. Calm wind becoming northeast 5 to 7 mph in the afternoon.
Tuesday Night
Clear, with a low around 53. Calm wind.
Wednesday
Sunny, with a high near 82. Calm wind becoming northeast around 6 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 56. Light east wind.
Thursday
Sunny, with a high near 79. Light east wind becoming east southeast 5 to 9 mph in the morning.
Thursday Night
Partly cloudy, with a low around 54. East southeast wind around 6 mph.
Friday
Partly sunny, with a high near 82. South wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 62. South wind 6 to 8 mph.
Saturday
A chance of showers and thunderstorms, then showers likely after 1pm. Partly sunny, with a high near 78. Southwest wind 9 to 15 mph, with gusts as high as 21 mph.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 51. West southwest wind 7 to 10 mph.
Sunday
A slight chance of showers. Sunny, with a high near 69. West northwest wind 9 to 16 mph, with gusts as high as 21 mph.
Sunday Night
Clear, with a low around 42. West northwest wind 5 to 9 mph becoming light west.
Monday
Sunny, with a high near 72. Southwest wind 5 to 10 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Dahlgren IL
 38.17°N 88.72°W
Last Update:
1:31 am CDT Oct 14, 2025
Forecast Valid:
1am CDT Oct 14, 2025-6pm CDT Oct 20, 2025
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation