National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Fort Belvoir (KDAA)

Lat: 38.72°NLon: 77.18°WElev: 69ft.

Overcast

72°F

22°C

Humidity 90%
Wind Speed Calm
Barometer 30.11 in (1019.9 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 27 Jun 6:55 pm EDT
Extended Forecast for

Mount Vernon VA

  • Tonight

    Tonight: Scattered showers and thunderstorms between 1am and 2am, then isolated showers. Patchy fog between 10pm and 5am. Otherwise, cloudy, with a low around 72. East wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 30%.

    Low: 72 °F

    Scattered
    Showers and
    Patchy Fog

  • Saturday

    Saturday: A slight chance of showers, then a chance of showers and thunderstorms after 4pm. Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 92. Heat index values as high as 103. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 30%.

    High: 92 °F

    Patchy Fog
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, mainly before 11pm. Mostly cloudy, with a low around 73. Light southwest wind. Chance of precipitation is 30%.

    Low: 73 °F

    Chance
    T-storms

  • Sunday

    Sunday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92. Light northwest wind. Chance of precipitation is 20%.

    High: 92 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 74. Calm wind. Chance of precipitation is 20%.

    Low: 74 °F

    Slight Chance
    T-storms

  • Monday

    Monday: Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 92. Chance of precipitation is 60%.

    High: 92 °F

    Partly Sunny
    then Showers
    Likely

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 75. Chance of precipitation is 60%.

    Low: 75 °F

    Showers
    Likely then
    Chance
    T-storms

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm, mainly after 2pm. Partly sunny, with a high near 90. Chance of precipitation is 70%.

    High: 90 °F

    Chance
    Showers then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 72. Chance of precipitation is 60%.

    Low: 72 °F

    Showers
    Likely then
    Chance
    T-storms

Detailed Forecast

Tonight
Scattered showers and thunderstorms between 1am and 2am, then isolated showers. Patchy fog between 10pm and 5am. Otherwise, cloudy, with a low around 72. East wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 30%.
Saturday
A slight chance of showers, then a chance of showers and thunderstorms after 4pm. Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 92. Heat index values as high as 103. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms, mainly before 11pm. Mostly cloudy, with a low around 73. Light southwest wind. Chance of precipitation is 30%.
Sunday
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92. Light northwest wind. Chance of precipitation is 20%.
Sunday Night
A slight chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 74. Calm wind. Chance of precipitation is 20%.
Monday
Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 92. Chance of precipitation is 60%.
Monday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 75. Chance of precipitation is 60%.
Tuesday
Showers likely and possibly a thunderstorm, mainly after 2pm. Partly sunny, with a high near 90. Chance of precipitation is 70%.
Tuesday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 72. Chance of precipitation is 60%.
Wednesday
Sunny, with a high near 90.
Wednesday Night
Partly cloudy, with a low around 72.
Thursday
Mostly sunny, with a high near 91.
Thursday Night
Partly cloudy, with a low around 71.
Independence Day
Sunny, with a high near 89.
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon VA
 38.72°N 77.08°W (Elev. 13 ft)
Last Update:
4:29 pm EDT Jun 27, 2025
Forecast Valid:
7pm EDT Jun 27, 2025-6pm EDT Jul 4, 2025
 
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