Mount Vernon, VA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mount Vernon, a community in Fairfax County, Virginia.
Tonight
53°F
Mostly Clear
Mostly clear, with a low around 53. South wind around 3 mph.
7-day forecast for Mount Vernon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 53°F | Mostly Clear | 3 mph S | 2% |
| Wednesday | 76°F | Patchy Fog then Mostly Sunny | 2 to 9 mph S | 2% |
| Wednesday Night | 63°F | Mostly Cloudy then Chance Light Rain | 7 mph S | 27% |
| Thursday | 76°F | Chance Light Rain | 7 to 10 mph S | 28% |
| Thursday Night | 63°F | Light Rain Likely | 2 to 6 mph S | 60% |
| Friday | 72°F | Rain Likely | 5 mph NW | 74% |
| Friday Night | 53°F | Light Rain Likely | 2 to 6 mph NW | 72% |
| Saturday | 67°F | Mostly Sunny | 6 to 10 mph NW | 13% |
| Saturday Night | 45°F | Partly Cloudy | 7 mph NW | 13% |
| Sunday | 63°F | Mostly Sunny | 7 mph W | 5% |
| Sunday Night | 44°F | Partly Cloudy then Slight Chance Light Rain | 6 mph NW | 18% |
| Monday | 63°F | Slight Chance Light Rain | 6 to 14 mph NW | 21% |
| Monday Night | 42°F | Slight Chance Light Rain | 5 to 8 mph W | 21% |
| Tuesday | 66°F | Sunny | 6 to 12 mph W | 12% |
Forecast source: National Weather Service (api.weather.gov) for Mount Vernon (38.713, -77.105). Updated through the day.
Growing snapshot for Mount Vernon
Last spring frost
Apr 3
First fall frost
Nov 8
Growing season
217 days
Hardiness zone
7b
More local growing data for Mount Vernon: nearby ZIP 22309 weather · frost dates · planting calendar · Virginia frost dates
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Fair Lakes
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Fairfax
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Floris
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Greenbriar
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Climate data from the nearest NOAA station, Oxon Hill, Md (7.9 mi from Mount Vernon). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.