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.

Fair

46°F

8°C

Humidity 68%
Wind Speed S 6 mph
Barometer 30.11 in (1019.9 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill43°F (6°C)
Last update 20 Mar 8:55 am EDT
Extended Forecast for

Mount Vernon VA

  • Today

    Today: Increasing clouds, with a high near 71. South wind 5 to 15 mph, with gusts as high as 26 mph.

    High: 71 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Showers likely, mainly before 1am. Cloudy during the early evening, then gradual clearing, with a low around 50. Southwest wind 6 to 9 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 50 °F

    Showers
    Likely

  • Saturday

    Saturday: Mostly sunny, with a high near 66. North wind around 7 mph.

    High: 66 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 47. Light and variable wind.

    Low: 47 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 77. Southwest wind 5 to 9 mph.

    High: 77 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A chance of rain, mainly after 2am. Mostly cloudy, with a low around 56. Chance of precipitation is 40%.

    Low: 56 °F

    Chance Rain

  • Monday

    Monday: A chance of rain before 2pm. Partly sunny, with a high near 64. Chance of precipitation is 30%.

    High: 64 °F

    Chance Rain

  • Monday Night

    Monday Night: Mostly clear, with a low around 34.

    Low: 34 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 53.

    High: 53 °F

    Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 71. South wind 5 to 15 mph, with gusts as high as 26 mph.
Tonight
Showers likely, mainly before 1am. Cloudy during the early evening, then gradual clearing, with a low around 50. Southwest wind 6 to 9 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Mostly sunny, with a high near 66. North wind around 7 mph.
Saturday Night
Partly cloudy, with a low around 47. Light and variable wind.
Sunday
Partly sunny, with a high near 77. Southwest wind 5 to 9 mph.
Sunday Night
A chance of rain, mainly after 2am. Mostly cloudy, with a low around 56. Chance of precipitation is 40%.
Monday
A chance of rain before 2pm. Partly sunny, with a high near 64. Chance of precipitation is 30%.
Monday Night
Mostly clear, with a low around 34.
Tuesday
Sunny, with a high near 53.
Tuesday Night
Mostly cloudy, with a low around 39.
Wednesday
Mostly cloudy, with a high near 58.
Wednesday Night
Mostly cloudy, with a low around 42.
Thursday
Mostly sunny, with a high near 66.
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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:
7:53 am EDT Mar 20, 2026
Forecast Valid:
9am EDT Mar 20, 2026-6pm EDT Mar 26, 2026
 
Forecast Discussion
 
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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