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.

Mostly Cloudy

77°F

25°C

Humidity 85%
Wind Speed Calm
Barometer 30.06 in (1018.2 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 15 Aug 1:55 am EDT
Extended Forecast for

Franconia VA

  • Overnight

    Overnight: Partly cloudy, with a low around 72. Calm wind.

    Low: 72 °F

    Partly Cloudy

  • Saturday

    Saturday: Increasing clouds, with a high near 88. Northeast wind around 5 mph becoming light and variable in the afternoon.

    High: 88 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: A slight chance of showers between 2am and 5am, then a chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 72. Light southeast wind. Chance of precipitation is 30%.

    Low: 72 °F

    Partly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: Showers and thunderstorms before 4pm, then showers and thunderstorms likely after 5pm. High near 85. South wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 85 °F

    Showers
    Likely then
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a slight chance of showers after 2am. Mostly cloudy, with a low around 73. South wind around 7 mph becoming west after midnight. Chance of precipitation is 70%.

    Low: 73 °F

    Showers
    Likely

  • Monday

    Monday: Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 71.

    Low: 71 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 72. Calm wind.
Saturday
Increasing clouds, with a high near 88. Northeast wind around 5 mph becoming light and variable in the afternoon.
Saturday Night
A slight chance of showers between 2am and 5am, then a chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 72. Light southeast wind. Chance of precipitation is 30%.
Sunday
Showers and thunderstorms before 4pm, then showers and thunderstorms likely after 5pm. High near 85. South wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday Night
A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a slight chance of showers after 2am. Mostly cloudy, with a low around 73. South wind around 7 mph becoming west after midnight. Chance of precipitation is 70%.
Monday
Mostly sunny, with a high near 89.
Monday Night
Mostly clear, with a low around 71.
Tuesday
Sunny, with a high near 87.
Tuesday Night
Mostly clear, with a low around 68.
Wednesday
Sunny, with a high near 89.
Wednesday Night
A slight chance of showers. Partly cloudy, with a low around 72. Chance of precipitation is 20%.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 40%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 40%.
Friday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
Franconia VA
 38.77°N 77.16°W (Elev. 197 ft)
Last Update:
2:22 am EDT Aug 15, 2026
Forecast Valid:
2am EDT Aug 15, 2026-6pm EDT Aug 21, 2026
 
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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