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

39°F

4°C

Humidity 86%
Wind Speed Calm
Barometer 30.25 in (1024.7 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Last update 8 Jan 8:55 pm EST
Extended Forecast for

3 Miles SE Mount Vernon VA

  • Tonight

    Tonight: Partly cloudy, with a low around 39. Light southeast wind.

    Low: 39 °F

    Partly Cloudy

  • Friday

    Friday: A chance of rain, mainly after 4pm. Increasing clouds, with a high near 58. Light south wind increasing to 5 to 9 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 30%.

    High: 58 °F

    Partly Sunny
    then Chance
    Rain

  • Friday Night

    Friday Night: Rain, mainly after 1am. Patchy fog between midnight and 3am. Low around 50. Southwest wind 5 to 8 mph becoming light and variable after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 50 °F

    Rain and
    Patchy Fog

  • Saturday

    Saturday: Rain. Patchy fog before 7am. High near 60. Light and variable wind becoming southeast 5 to 8 mph in the morning. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 60 °F

    Rain and
    Patchy Fog

  • Saturday Night

    Saturday Night: Rain likely, mainly before 1am. Cloudy, with a low around 45. Southwest wind 6 to 8 mph becoming northwest after midnight. Chance of precipitation is 70%.

    Low: 45 °F

    Rain Likely

  • Sunday

    Sunday: A slight chance of rain before 1pm, then a slight chance of rain and snow. Partly sunny, with a high near 51. Chance of precipitation is 20%.

    High: 51 °F

    Slight Chance
    Rain then
    Slight Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 31.

    Low: 31 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 45.

    High: 45 °F

    Sunny

  • Monday Night

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

    Low: 30 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 39. Light southeast wind.
Friday
A chance of rain, mainly after 4pm. Increasing clouds, with a high near 58. Light south wind increasing to 5 to 9 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 30%.
Friday Night
Rain, mainly after 1am. Patchy fog between midnight and 3am. Low around 50. Southwest wind 5 to 8 mph becoming light and variable after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Rain. Patchy fog before 7am. High near 60. Light and variable wind becoming southeast 5 to 8 mph in the morning. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Saturday Night
Rain likely, mainly before 1am. Cloudy, with a low around 45. Southwest wind 6 to 8 mph becoming northwest after midnight. Chance of precipitation is 70%.
Sunday
A slight chance of rain before 1pm, then a slight chance of rain and snow. Partly sunny, with a high near 51. Chance of precipitation is 20%.
Sunday Night
Mostly clear, with a low around 31.
Monday
Sunny, with a high near 45.
Monday Night
Partly cloudy, with a low around 30.
Tuesday
Sunny, with a high near 51.
Tuesday Night
Partly cloudy, with a low around 36.
Wednesday
Mostly cloudy, with a high near 50.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 35. Chance of precipitation is 30%.
Thursday
A chance of rain. Mostly cloudy, with a high near 41. Chance of precipitation is 30%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Mount Vernon VA
 38.69°N 77.06°W (Elev. 144 ft)
Last Update:
8:57 pm EST Jan 8, 2026
Forecast Valid:
9pm EST Jan 8, 2026-6pm EST Jan 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