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Hazardous Weather Conditions

Current conditions at

Fort Belvoir (KDAA)

Lat: 38.72°NLon: 77.18°WElev: 69ft.

Fair

94°F

34°C

Humidity 58%
Wind Speed S 5 mph
Barometer 29.87 in (1011.7 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index109°F (43°C)
Last update 17 Jul 5:55 pm EDT
Extended Forecast for

Lorton VA

Heat Advisory July 17, 06:25pm until July 17, 08:00pm
Click here for hazard details and duration
...
  •  
    Heat Advisory July 17, 06:25pm until July 17, 08:00pm

    NOW until 8:00pm Thu

    Heat Advisory

  • Tonight

    Low: 75 °F

    Isolated
    T-storms then
    Partly Cloudy

  • Friday

    Friday: A chance of showers and thunderstorms, mainly after 5pm. Partly sunny, with a high near 87. North wind around 6 mph becoming southwest in the afternoon. Chance of precipitation is 30%.

    High: 87 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Light and variable wind. Chance of precipitation is 40%.

    Low: 73 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 86. Light and variable wind becoming south 5 to 7 mph in the morning. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 86 °F

    Chance
    Showers then
    Showers

  • Saturday Night

    Saturday Night: Showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Low around 73. South wind 3 to 5 mph. Chance of precipitation is 80%.

    Low: 73 °F

    Showers then
    Slight Chance
    Showers

  • Sunday

    Sunday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 89. Chance of precipitation is 50%.

    High: 89 °F

    Mostly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 71. Chance of precipitation is 30%.

    Low: 71 °F

    Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny

Detailed Forecast

Tonight
Isolated showers and thunderstorms before 8pm. Partly cloudy, with a low around 75. Southwest wind 5 to 11 mph becoming northwest after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 20%.
Friday
A chance of showers and thunderstorms, mainly after 5pm. Partly sunny, with a high near 87. North wind around 6 mph becoming southwest in the afternoon. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Light and variable wind. Chance of precipitation is 40%.
Saturday
A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 86. Light and variable wind becoming south 5 to 7 mph in the morning. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
Showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Low around 73. South wind 3 to 5 mph. Chance of precipitation is 80%.
Sunday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 89. Chance of precipitation is 50%.
Sunday Night
A chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 71. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 84.
Monday Night
Partly cloudy, with a low around 67.
Tuesday
Mostly sunny, with a high near 85.
Tuesday Night
Partly cloudy, with a low around 68.
Wednesday
Mostly sunny, with a high near 87.
Wednesday Night
Partly cloudy, with a low around 71.
Thursday
Mostly sunny, with a high near 92.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lorton VA
 38.71°N 77.26°W (Elev. 249 ft)
Last Update:
4:31 pm EDT Jul 17, 2025
Forecast Valid:
6pm EDT Jul 17, 2025-6pm EDT Jul 24, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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