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

Severe Weather Across the Center of the Nation; Fire Weather Concerns for Southwest and California; Snow for the Central Rockies

Severe thunderstorms will continue to impact the center of the Nation through today. Very large hail, strong tornadoes, and damaging winds are expected from the Great Lakes into the central/southern Plains; Flash flooding is possible for portions into the mid-Mississippi Valley. Critical fire weather conditions for the Southwest and central valley of California today. Winter hangs on for Rockies. Read More >

Current conditions at

Fort Belvoir (KDAA)

Lat: 38.72°NLon: 77.18°WElev: 69ft.

Fair

84°F

29°C

Humidity 57%
Wind Speed SE 7 mph
Barometer 30.15 in (1021.2 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 18 May 10:55 am EDT
Extended Forecast for

Fairfax VA

  • Today

    Today: Sunny, with a high near 94. South wind 5 to 7 mph.

    High: 94 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 71. South wind around 8 mph.

    Low: 71 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 95. Southwest wind 6 to 10 mph, with gusts as high as 18 mph.

    High: 95 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 73. Southwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 73 °F

    Mostly Clear

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm after 2pm. High near 95. West wind 5 to 10 mph. Chance of precipitation is 80%.

    High: 95 °F

    Sunny then
    Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm before 8pm, then showers likely. Low around 59. Chance of precipitation is 80%.

    Low: 59 °F

    Showers

  • Thursday

    Thursday: Showers likely, mainly between 8am and 2pm. Mostly cloudy, with a high near 68. Chance of precipitation is 60%.

    High: 68 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A chance of showers. Mostly cloudy, with a low around 54. Chance of precipitation is 40%.

    Low: 54 °F

    Chance
    Showers

  • Friday

    Friday: Showers likely. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.

    High: 65 °F

    Showers
    Likely

Detailed Forecast

Today
Sunny, with a high near 94. South wind 5 to 7 mph.
Tonight
Mostly clear, with a low around 71. South wind around 8 mph.
Tuesday
Mostly sunny, with a high near 95. Southwest wind 6 to 10 mph, with gusts as high as 18 mph.
Tuesday Night
Mostly clear, with a low around 73. Southwest wind around 10 mph, with gusts as high as 20 mph.
Wednesday
Showers and possibly a thunderstorm after 2pm. High near 95. West wind 5 to 10 mph. Chance of precipitation is 80%.
Wednesday Night
Showers and possibly a thunderstorm before 8pm, then showers likely. Low around 59. Chance of precipitation is 80%.
Thursday
Showers likely, mainly between 8am and 2pm. Mostly cloudy, with a high near 68. Chance of precipitation is 60%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 54. Chance of precipitation is 40%.
Friday
Showers likely. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.
Friday Night
Showers likely, mainly before 2am. Mostly cloudy, with a low around 56. Chance of precipitation is 70%.
Saturday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 74. Chance of precipitation is 60%.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 61. Chance of precipitation is 60%.
Sunday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 78. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Fairfax VA
 38.85°N 77.29°W (Elev. 400 ft)
Last Update:
10:53 am EDT May 18, 2026
Forecast Valid:
11am EDT May 18, 2026-6pm EDT May 24, 2026
 
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