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.

Partly Cloudy

51°F

11°C

Humidity 38%
Wind Speed S 5 mph
Barometer 29.66 in (1004.7 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 14 Jan 8:55 am EST
Extended Forecast for

Mount Vernon VA

  • Today

    Today: Mostly cloudy, with a high near 54. South wind 6 to 9 mph.

    High: 54 °F

    Mostly Cloudy

  • Tonight

    Tonight: Rain likely, mainly between 1am and 4am. Cloudy, with a low around 27. South wind 8 to 18 mph becoming northwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 27 °F

    Rain Likely

  • Thursday

    Thursday: Mostly sunny, with a high near 33. Northwest wind 15 to 17 mph, with gusts as high as 29 mph.

    High: 33 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 21. West wind 8 to 13 mph, with gusts as high as 24 mph.

    Low: 21 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 37. South wind 6 to 13 mph, with gusts as high as 21 mph.

    High: 37 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

  • Saturday

    Saturday: A chance of rain and snow before 1pm. Partly sunny, with a high near 46. Chance of precipitation is 30%.

    High: 46 °F

    Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 25.

    Low: 25 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 35.

    High: 35 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 54. South wind 6 to 9 mph.
Tonight
Rain likely, mainly between 1am and 4am. Cloudy, with a low around 27. South wind 8 to 18 mph becoming northwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Mostly sunny, with a high near 33. Northwest wind 15 to 17 mph, with gusts as high as 29 mph.
Thursday Night
Mostly clear, with a low around 21. West wind 8 to 13 mph, with gusts as high as 24 mph.
Friday
Mostly sunny, with a high near 37. South wind 6 to 13 mph, with gusts as high as 21 mph.
Friday Night
Partly cloudy, with a low around 30.
Saturday
A chance of rain and snow before 1pm. Partly sunny, with a high near 46. Chance of precipitation is 30%.
Saturday Night
Mostly cloudy, with a low around 25.
Sunday
Mostly sunny, with a high near 35.
Sunday Night
Mostly clear, with a low around 21.
M.L.King Day
Mostly sunny, with a high near 36.
Monday Night
Partly cloudy, with a low around 19.
Tuesday
Mostly sunny, with a high near 32.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon VA
 38.72°N 77.11°W (Elev. 36 ft)
Last Update:
6:53 am EST Jan 14, 2026
Forecast Valid:
9am EST Jan 14, 2026-6pm EST Jan 20, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation