Sir John Addition, Virginia Weather
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Weather Forecast for Sir John Addition, Virginia : Frederick County
Issued: 10:30 am EDT May 11, 2025 Latitude: 39.2551024 Longitude: -78.1558344 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Monday Tuesday Wednesday Thursday Friday Saturday
Partly Sunny on This Afternoon Mostly Cloudy on Tonight 40% chance of rain on Monday 100% chance of thunderstorms on Tuesday 90% chance of thunderstorms on Wednesday 60% chance of thunderstorms on Thursday 50% chance of thunderstorms on Friday 50% chance of thunderstorms on Saturday
High: 80°F Low: 53°F High: 69°F High: 68°F High: 72°F High: 78°F High: 86°F High: 82°F
Low: 59°F Low: 61°F Low: 61°F Low: 62°F Low: 63°F  
Partly Sunny Mostly Cloudy Rain Thunderstorms Thunderstorms Thunderstorms Thunderstorms Thunderstorms
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Current Conditions at
WINCHESTER RGNL - (KOKV)
70°
Clear
as of 11:35 AM EDST
Rel. Humidity: 40%
Dew Point: 45°F
Visibility: 10 Miles
Pressure: 30.26 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
LEESBURG/GODFREY - (KJYO)
77°
Clear
as of 11:35 AM EDST
Rel. Humidity: 44%
Dew Point: 54°F
Visibility: 10 Miles
Pressure: 30.26 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Partly Sunny on This Afternoon This Afternoon... Partly sunny, with a high near 80. Calm wind becoming east around 6 mph.
Mostly Cloudy on Tonight Tonight... Mostly cloudy, with a low around 53. Northeast wind 3 to 6 mph.
40% chance of rain Monday Monday... A chance of showers, mainly after noon. Mostly cloudy, with a high near 69. Light and variable wind becoming south 5 to 9 mph in the morning. Chance of precipitation is 40%.
90% chance of rain Monday Night Monday Night... Showers. Low around 59. Southeast wind around 6 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
100% chance of thunderstorms Tuesday Tuesday... Showers, with thunderstorms also possible after 2pm. High near 68. East wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 100%.
90% chance of thunderstorms Tuesday Night Tuesday Night... Showers and possibly a thunderstorm. Low around 61. Chance of precipitation is 90%.
90% chance of thunderstorms Wednesday Wednesday... Showers likely, then showers and possibly a thunderstorm after 2pm. High near 72. Chance of precipitation is 90%.
80% chance of thunderstorms Wednesday Night Wednesday Night... Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Low around 61. Chance of precipitation is 80%.
60% chance of thunderstorms Thursday Thursday... Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 78. Chance of precipitation is 60%.
60% chance of thunderstorms Thursday Night Thursday Night... Showers likely and possibly a thunderstorm before 8pm. Partly cloudy, with a low around 62. Chance of precipitation is 60%.
50% chance of thunderstorms Friday Friday... A chance of showers and thunderstorms. 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. Partly cloudy, with a low around 63. Chance of precipitation is 30%.
50% chance of thunderstorms Saturday Saturday... A chance of showers and thunderstorms. Partly sunny, with a high near 82. Chance of precipitation is 50%.
Sun Almanac for Sir John Addition, Virginia
Sunrise: 06:02 AM
Sunset: 8:16 PM
Civil Sunrise:05:33 AM
Civil Sunset: 8:45 PM
Nautical Sunrise: 04:56 AM
Nautical Sunset: 9:22 PM
Astro Sunrise: 04:16 AM
Astro Sunset: 10:02 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.