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

84°F

29°C

Humidity 19%
Wind Speed S 12 G 18 mph
Barometer 29.96 in (1014.8 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 10 Mar 2:55 pm EDT
Extended Forecast for

Mount Vernon VA

  • Tonight

    Tonight: Mostly clear, with a low around 60. South wind 3 to 6 mph.

    Low: 60 °F

    Mostly Clear

  • Wednesday

    Wednesday: A chance of rain before 3pm, then a chance of rain after 4pm. Partly sunny, with a high near 82. South wind 5 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.

    High: 82 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after 2am. Mostly cloudy, with a low around 52. South wind 9 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 52 °F

    Chance Rain
    then Rain
    Likely

  • Thursday

    Thursday: Rain likely, mainly before 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 56. Northwest wind 15 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 56 °F

    Rain Likely

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 34. Northwest wind 5 to 7 mph becoming calm after midnight.

    Low: 34 °F

    Mostly Clear

  • Friday

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

    High: 55 °F

    Mostly Sunny
    then Partly
    Sunny and
    Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 58.

    High: 58 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 60. South wind 3 to 6 mph.
Wednesday
A chance of rain before 3pm, then a chance of rain after 4pm. Partly sunny, with a high near 82. South wind 5 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.
Wednesday Night
Rain likely, mainly after 2am. Mostly cloudy, with a low around 52. South wind 9 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
Rain likely, mainly before 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 56. Northwest wind 15 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Mostly clear, with a low around 34. Northwest wind 5 to 7 mph becoming calm after midnight.
Friday
Partly sunny, with a high near 55. Breezy.
Friday Night
Partly cloudy, with a low around 43.
Saturday
Mostly sunny, with a high near 58.
Saturday Night
Mostly cloudy, with a low around 42.
Sunday
Mostly cloudy, with a high near 68.
Sunday Night
Rain. Low around 53. Chance of precipitation is 80%.
Monday
Rain. High near 64. Chance of precipitation is 80%.
Monday Night
A chance of rain. Partly cloudy, with a low around 28. Chance of precipitation is 30%.
Tuesday
Mostly sunny, with a high near 40.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon VA
 38.72°N 77.11°W (Elev. 36 ft)
Last Update:
2:35 pm EDT Mar 10, 2026
Forecast Valid:
3pm EDT Mar 10, 2026-6pm EDT Mar 17, 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