McLean, VA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for McLean, a community in Fairfax County, Virginia.
Tonight
64°F
Mostly Cloudy then Chance Light Rain
A chance of rain after 2am. Mostly cloudy, with a low around 64. South wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for McLean
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 64°F | Mostly Cloudy then Chance Light Rain | 6 to 10 mph S | 37% |
| Thursday | 75°F | Chance Light Rain then Mostly Cloudy | 8 to 12 mph S | 37% |
| Thursday Night | 59°F | Mostly Cloudy then Chance Light Rain | 2 to 8 mph SW | 37% |
| Friday | 70°F | Chance Light Rain | 5 mph N | 29% |
| Friday Night | 48°F | Chance Light Rain then Partly Cloudy | 1 to 10 mph N | 28% |
| Saturday | 62°F | Mostly Sunny | 10 to 14 mph NW | 7% |
| Saturday Night | 42°F | Partly Cloudy | 12 mph NW | 5% |
| Sunday | 61°F | Mostly Sunny | 7 to 14 mph NW | 1% |
| Sunday Night | 42°F | Mostly Clear | 6 to 9 mph NW | 0% |
| Monday | 62°F | Sunny | 8 to 13 mph NW | 0% |
| Monday Night | 40°F | Mostly Clear | 2 to 6 mph W | 0% |
| Tuesday | 66°F | Sunny | 3 to 9 mph SW | 1% |
| Tuesday Night | 42°F | Mostly Clear | 6 mph W | 1% |
| Veterans Day | 63°F | Sunny | 3 to 7 mph NW | 1% |
Forecast source: National Weather Service (api.weather.gov) for McLean (38.944, -77.193). Updated through the day.
Growing snapshot for McLean
Last spring frost
Apr 9
First fall frost
Oct 31
Growing season
202 days
Hardiness zone
7b
More local growing data for McLean: nearby ZIP 22101 weather · frost dates · planting calendar · Virginia frost dates
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Climate data from the nearest NOAA station, Dalecarlia Rsvr, Md (2.8 mi from McLean). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.