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

47°F

8°C

Humidity 96%
Wind Speed Calm
Barometer 29.79 in (1009.1 mb)
Dewpoint 46°F (8°C)
Visibility 6.00 mi
Last update 11 Jan 12:55 am EST
Extended Forecast for

Mount Vernon VA

  • Overnight

    Overnight: A slight chance of rain before 2am. Cloudy, with a low around 39. Light and variable wind becoming northwest 5 to 7 mph. Winds could gust as high as 24 mph. Chance of precipitation is 20%.

    Low: 39 °F

    Slight Chance
    Rain

  • Sunday

    Sunday: A chance of rain and snow showers between 1pm and 4pm. Cloudy through mid morning, then gradual clearing, with a high near 47. Breezy, with a west wind 7 to 12 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 38 mph. Chance of precipitation is 50%.

    High: 47 °F

    Mostly Sunny
    then Chance
    Rain/Snow and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 30. Northwest wind 9 to 14 mph, with gusts as high as 36 mph.

    Low: 30 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 47. West wind around 7 mph becoming southwest in the afternoon.

    High: 47 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 30. Southwest wind around 5 mph becoming calm in the evening.

    Low: 30 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 51.

    High: 51 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Cloudy, with a high near 53.

    High: 53 °F

    Cloudy

  • Wednesday Night

    Wednesday Night: A chance of rain after 1am. Mostly cloudy, with a low around 34. Chance of precipitation is 30%.

    Low: 34 °F

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

Overnight
A slight chance of rain before 2am. Cloudy, with a low around 39. Light and variable wind becoming northwest 5 to 7 mph. Winds could gust as high as 24 mph. Chance of precipitation is 20%.
Sunday
A chance of rain and snow showers between 1pm and 4pm. Cloudy through mid morning, then gradual clearing, with a high near 47. Breezy, with a west wind 7 to 12 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 38 mph. Chance of precipitation is 50%.
Sunday Night
Mostly clear, with a low around 30. Northwest wind 9 to 14 mph, with gusts as high as 36 mph.
Monday
Sunny, with a high near 47. West wind around 7 mph becoming southwest in the afternoon.
Monday Night
Partly cloudy, with a low around 30. Southwest wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 51.
Tuesday Night
Mostly cloudy, with a low around 40.
Wednesday
Cloudy, with a high near 53.
Wednesday Night
A chance of rain after 1am. Mostly cloudy, with a low around 34. Chance of precipitation is 30%.
Thursday
A chance of rain before 1pm, then a chance of rain and snow. Partly sunny, with a high near 41. Chance of precipitation is 40%.
Thursday Night
Partly cloudy, with a low around 23.
Friday
Mostly sunny, with a high near 37.
Friday Night
Partly cloudy, with a low around 25.
Saturday
Partly sunny, with a high near 42.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon VA
 38.74°N 77.11°W (Elev. 49 ft)
Last Update:
12:53 am EST Jan 11, 2026
Forecast Valid:
1am EST Jan 11, 2026-6pm EST Jan 17, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation