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

40°F

4°C

Humidity 92%
Wind Speed Calm
Barometer 30.03 in (1017.2 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 9 Mar 7:55 am EDT
Extended Forecast for

Mount Vernon VA

  • Today

    Today: Sunny, with a high near 71. Calm wind becoming south around 5 mph in the afternoon.

    High: 71 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 49. Light south wind.

    Low: 49 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 77. Calm wind becoming south around 6 mph in the afternoon.

    High: 77 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 62. South wind around 6 mph.

    Low: 62 °F

    Mostly Clear

  • Wednesday

    Wednesday: A chance of rain after 2pm. Partly sunny, with a high near 78. South wind 6 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.

    High: 78 °F

    Partly Sunny
    then Chance
    Rain

  • Wednesday Night

    Wednesday Night: A chance of rain, then rain likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 44. Breezy. Chance of precipitation is 70%.

    Low: 44 °F

    Breezy.
    Chance Rain
    then Rain
    Likely

  • Thursday

    Thursday: Rain likely before 2pm, then a chance of rain and snow. Mostly cloudy, with a high near 56. Windy. Chance of precipitation is 70%.

    High: 56 °F

    Rain Likely
    and Windy
    then
    Rain/Snow
    Likely and
    Breezy

  • Thursday Night

    Thursday Night: A chance of rain and snow before 8pm. Mostly clear, with a low around 35. Chance of precipitation is 30%.

    Low: 35 °F

    Chance
    Rain/Snow
    then Mostly
    Clear

  • Friday

    Friday: Partly sunny, with a high near 55. Breezy.

    High: 55 °F

    Partly Sunny
    then Partly
    Sunny and
    Breezy

Detailed Forecast

Today
Sunny, with a high near 71. Calm wind becoming south around 5 mph in the afternoon.
Tonight
Mostly clear, with a low around 49. Light south wind.
Tuesday
Sunny, with a high near 77. Calm wind becoming south around 6 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 62. South wind around 6 mph.
Wednesday
A chance of rain after 2pm. Partly sunny, with a high near 78. South wind 6 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Wednesday Night
A chance of rain, then rain likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 44. Breezy. Chance of precipitation is 70%.
Thursday
Rain likely before 2pm, then a chance of rain and snow. Mostly cloudy, with a high near 56. Windy. Chance of precipitation is 70%.
Thursday Night
A chance of rain and snow before 8pm. Mostly clear, with a low around 35. Chance of precipitation is 30%.
Friday
Partly sunny, with a high near 55. Breezy.
Friday Night
Partly cloudy, with a low around 43. Breezy.
Saturday
Partly sunny, with a high near 56.
Saturday Night
Mostly cloudy, with a low around 42.
Sunday
Mostly cloudy, with a high near 64.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon VA
 38.7°N 77.11°W (Elev. 3 ft)
Last Update:
7:53 am EDT Mar 9, 2026
Forecast Valid:
8am EDT Mar 9, 2026-6pm EDT Mar 15, 2026
 
Forecast Discussion
 
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Additional Resources

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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