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

Severe Weather and Heavy Rainfall in the Midwest and Desert Southwest; Mid-Summer Heat Continues

Severe thunderstorm and heavy rainfall are possible in the Midwest into the Central Appalachians and the Desert Southwest early this week. Storms are also expected in parts of the northern Plains today. Fire weather and air quality concerns will persist across portions of the West. Mid-summer heat will continue across much of the CONUS this week, especially in the the south-central High Plains. Read More >

Hazardous Weather Conditions

Current conditions at

Fort Belvoir (KDAA)

Lat: 38.72°NLon: 77.18°WElev: 69ft.

Fair

91°F

33°C

Humidity 52%
Wind Speed Calm
Barometer 30.00 in (1016.1 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index98°F (37°C)
Last update 10 Aug 11:55 am EDT
Extended Forecast for

Mount Vernon VA

  • This Afternoon

    This Afternoon: A chance of showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 94. Southwest wind 3 to 8 mph. Chance of precipitation is 30%.

    High: 94 °F

    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly before 7pm. Mostly cloudy, with a low around 75. Light and variable wind. Chance of precipitation is 30%.

    Low: 75 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 91. Calm wind becoming northwest 5 to 7 mph in the morning. Chance of precipitation is 40%.

    High: 91 °F

    Partly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms likely. Mostly cloudy, with a low around 72. Light west wind. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 72 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 5pm. Mostly sunny, with a high near 90. Northwest wind 3 to 5 mph. Chance of precipitation is 30%.

    High: 90 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 73. Chance of precipitation is 40%.

    Low: 73 °F

    Chance
    Showers

  • Thursday

    Thursday: A slight chance of showers after 2pm. Mostly sunny, with a high near 91. Chance of precipitation is 20%.

    High: 91 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 73. Chance of precipitation is 20%.

    Low: 73 °F

    Slight Chance
    T-storms

  • Friday

    Friday: A chance of showers and thunderstorms after 8am. Partly sunny, with a high near 86. Chance of precipitation is 30%.

    High: 86 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 94. Southwest wind 3 to 8 mph. Chance of precipitation is 30%.
Tonight
A chance of showers and thunderstorms, mainly before 7pm. Mostly cloudy, with a low around 75. Light and variable wind. Chance of precipitation is 30%.
Tuesday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 91. Calm wind becoming northwest 5 to 7 mph in the morning. Chance of precipitation is 40%.
Tuesday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 72. Light west wind. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
A chance of showers, with thunderstorms also possible after 5pm. Mostly sunny, with a high near 90. Northwest wind 3 to 5 mph. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 73. Chance of precipitation is 40%.
Thursday
A slight chance of showers after 2pm. Mostly sunny, with a high near 91. Chance of precipitation is 20%.
Thursday Night
A slight chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 73. Chance of precipitation is 20%.
Friday
A chance of showers and thunderstorms after 8am. Partly sunny, with a high near 86. Chance of precipitation is 30%.
Friday Night
A slight chance of showers. Mostly cloudy, with a low around 69. Chance of precipitation is 20%.
Saturday
Mostly sunny, with a high near 86.
Saturday Night
A chance of showers. Partly cloudy, with a low around 68. Chance of precipitation is 30%.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 30%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon VA
 38.72°N 77.08°W (Elev. 13 ft)
Last Update:
10:53 am EDT Aug 10, 2026
Forecast Valid:
12pm EDT Aug 10, 2026-6pm EDT Aug 16, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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