Sun Valley, Virginia Weather
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Weather Forecast for Sun Valley, Virginia : Fairfax County
Issued: 7:30 am EDT May 12, 2025 Latitude: 38.9398329 Longitude: -77.286094 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Tuesday Wednesday Thursday Friday Saturday Sunday
20% chance of rain on Today 80% chance of rain on Tonight 100% chance of thunderstorms on Tuesday 90% chance of thunderstorms on Wednesday 50% chance of on Thursday 50% chance of thunderstorms on Friday 50% chance of thunderstorms on Saturday Mostly Sunny on Sunday
High: 78°F Low: 63°F High: 68°F High: 76°F High: 80°F High: 86°F High: 84°F High: 81°F
Low: 64°F Low: 63°F Low: 66°F Low: 65°F Low: 64°F  
Rain Rain Thunderstorms Thunderstorms Partly Sunny Thunderstorms Thunderstorms Mostly Sunny
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Current Conditions at
WASH-DULLES - (KIAD)
72°
Partly Cloudy
as of 9:52 AM EDST
Rel. Humidity: 53%
Dew Point: 54°F
Visibility: 10 Miles
Pressure: 30.27 in.
Flight Rule: VFR
Wind Data
7 MPH
140° Southeast
Cloud Level(s): Scattered at 25000ft
Current Conditions at
WASHINGTON - (KDCA)
72°
Partly Cloudy
as of 9:52 AM EDST
Rel. Humidity: 53%
Dew Point: 54°F
Visibility: 10 Miles
Pressure: 30.27 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Few at 15000ft, Scattered at 25000ft
Current Conditions at
FORT BELVOIR - (KDAA)
73°
Clear
as of 9:55 AM EDST
Rel. Humidity: 53%
Dew Point: 55°F
Visibility: 10 Miles
Pressure: 30.24 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
LEESBURG/GODFREY - (KJYO)
68°
Clear
as of 9:55 AM EDST
Rel. Humidity: 72%
Dew Point: 59°F
Visibility: 10 Miles
Pressure: 30.29 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
20% chance of rain Today Today... A slight chance of showers after 2pm. Mostly cloudy, with a high near 78. South wind 6 to 9 mph. Chance of precipitation is 20%.
80% chance of rain Tonight Tonight... Showers, mainly after 11pm. Low around 63. Southeast wind around 6 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
100% chance of thunderstorms Tuesday Tuesday... Showers, with thunderstorms also possible after 5pm. High near 68. Southeast wind 10 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
100% chance of thunderstorms Tuesday Night Tuesday Night... Showers and possibly a thunderstorm. Low around 64. East wind 8 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
90% chance of thunderstorms Wednesday Wednesday... Showers likely, then showers and possibly a thunderstorm after 2pm. High near 76. East wind around 7 mph. Chance of precipitation is 90%.
80% chance of thunderstorms Wednesday Night Wednesday Night... Showers and possibly a thunderstorm before 11pm, then showers likely. Low around 63. Chance of precipitation is 80%.
50% chance of Thursday Thursday... A chance of showers. Partly sunny, with a high near 80. Chance of precipitation is 50%.
30% chance of rain Thursday Night Thursday Night... A chance of showers before 2am. Partly cloudy, with a low around 66. Chance of precipitation is 30%.
50% chance of thunderstorms Friday Friday... A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 86. Chance of precipitation is 50%.
30% chance of thunderstorms Friday Night Friday Night... A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 65. Chance of precipitation is 30%.
50% chance of thunderstorms Saturday Saturday... A chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 50%.
30% chance of thunderstorms Saturday Night Saturday Night... A chance of thunderstorms. Mostly clear, with a low around 64. Chance of precipitation is 30%.
Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 81.
Current Radar Image


Sun Almanac for Sun Valley, Virginia
Sunrise: 05:59 AM
Sunset: 8:12 PM
Civil Sunrise:05:29 AM
Civil Sunset: 8:42 PM
Nautical Sunrise: 04:52 AM
Nautical Sunset: 9:19 PM
Astro Sunrise: 04:12 AM
Astro Sunset: 9:59 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.