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

Fort Belvoir (KDAA)

Lat: 38.72°NLon: 77.18°WElev: 69ft.

Fog/Mist

51°F

11°C

Humidity 94%
Wind Speed Calm
Barometer 30.29 in (1026.0 mb)
Dewpoint 49°F (9°C)
Visibility 5.00 mi
Last update 29 Oct 1:55 am EDT
Extended Forecast for

Mount Vernon VASimilar City Names

  • Overnight

    Overnight: Patchy fog. Otherwise, mostly clear, with a low around 50. Calm wind.

    Low: 50 °F

    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 11am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 72. Calm wind becoming south around 6 mph in the afternoon.

    High: 72 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 51. Light southwest wind.

    Low: 51 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 76. Light and variable wind becoming northwest 9 to 14 mph in the morning. Winds could gust as high as 22 mph.

    High: 76 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 47. North wind 5 to 9 mph.

    Low: 47 °F

    Mostly Clear

  • Saturday

    Saturday: Partly sunny, with a high near 64.

    High: 64 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 46.

    Low: 46 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 68.

    High: 68 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 48.

    Low: 48 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Patchy fog. Otherwise, mostly clear, with a low around 50. Calm wind.
Thursday
Patchy fog before 11am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 72. Calm wind becoming south around 6 mph in the afternoon.
Thursday Night
Clear, with a low around 51. Light southwest wind.
Friday
Sunny, with a high near 76. Light and variable wind becoming northwest 9 to 14 mph in the morning. Winds could gust as high as 22 mph.
Friday Night
Mostly clear, with a low around 47. North wind 5 to 9 mph.
Saturday
Partly sunny, with a high near 64.
Saturday Night
Mostly cloudy, with a low around 46.
Sunday
Partly sunny, with a high near 68.
Sunday Night
Mostly cloudy, with a low around 48.
Monday
Mostly cloudy, with a high near 69.
Monday Night
Mostly cloudy, with a low around 51.
Tuesday
Partly sunny, with a high near 72.
Tuesday Night
A slight chance of showers. Mostly cloudy, with a low around 54. Chance of precipitation is 20%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 71. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon VASimilar City Names
 38.72°N 77.11°W (Elev. 36 ft)
Last Update:
2:22 am EDT Oct 29, 2026
Forecast Valid:
2am EDT Oct 29, 2026-6pm EST Nov 4, 2026
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation