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.

Fair

90°F

32°C

Humidity 69%
Wind Speed S 5 mph
Barometer 29.92 in (1013.4 mb)
Dewpoint 78°F (26°C)
Visibility 10.00 mi
Heat Index105°F (41°C)
Last update 16 Jul 4:55 pm EDT
Extended Forecast for

Mount Vernon VA

Flood Watch July 16, 06:47pm until July 17, 12:00am
Heat Advisory July 17, 11:00am until July 17, 08:00pm
Click here for hazard details and duration
Flood Watch
Heat Advisory
  •  
    Flood Watch July 16, 06:47pm until July 17, 12:00am

    NOW until 12:00am Thu

    Flood Watch

  • Tonight

    Low: 77 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Thursday

    Thursday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 95. Heat index values as high as 106. Southwest wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 95 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 77. Southwest wind around 6 mph becoming light and variable after midnight.

    Low: 77 °F

    Partly Cloudy

  • Friday

    Friday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 91. Northwest wind around 6 mph. Chance of precipitation is 40%.

    High: 91 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, with a low around 73. Calm wind. Chance of precipitation is 30%.

    Low: 73 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm, mainly after 2pm. Partly sunny, with a high near 87. Chance of precipitation is 60%.

    High: 87 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Saturday Night

    Saturday 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 74. Chance of precipitation is 60%.

    Low: 74 °F

    Showers
    Likely then
    Chance
    T-storms

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 90. Chance of precipitation is 60%.

    High: 90 °F

    Partly Sunny
    then Showers
    Likely

Detailed Forecast

Tonight
A chance of showers and thunderstorms before 11pm. Cloudy, then gradually becoming partly cloudy, with a low around 77. Southwest wind 5 to 8 mph. Chance of precipitation is 50%.
Thursday
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 95. Heat index values as high as 106. Southwest wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Thursday Night
Partly cloudy, with a low around 77. Southwest wind around 6 mph becoming light and variable after midnight.
Friday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 91. Northwest wind around 6 mph. Chance of precipitation is 40%.
Friday Night
A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, with a low around 73. Calm wind. Chance of precipitation is 30%.
Saturday
Showers likely and possibly a thunderstorm, mainly after 2pm. Partly sunny, with a high near 87. Chance of precipitation is 60%.
Saturday 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 74. Chance of precipitation is 60%.
Sunday
Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 90. Chance of precipitation is 60%.
Sunday Night
Showers likely and possibly a thunderstorm before 8pm. Mostly cloudy, with a low around 72. Chance of precipitation is 60%.
Monday
A chance of showers after 2pm. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
Monday Night
A chance of showers. Partly cloudy, with a low around 69. Chance of precipitation is 30%.
Tuesday
A chance of showers. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
Tuesday Night
A chance of showers. Partly cloudy, with a low around 71. Chance of precipitation is 30%.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 90. Chance of precipitation is 30%.
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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:
5:33 pm EDT Jul 16, 2025
Forecast Valid:
6pm EDT Jul 16, 2025-6pm EDT Jul 23, 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