Chantilly, VA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Chantilly, a community in Fairfax County, Virginia.
This Afternoon
76°F
Partly Sunny
Partly sunny, with a high near 76. South wind around 7 mph.
7-day forecast for Chantilly
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 76°F | Partly Sunny | 7 mph S | 0% |
| Tonight | 64°F | Mostly Cloudy then Chance Light Rain | 7 to 12 mph S | 46% |
| Thursday | 76°F | Chance Light Rain then Mostly Cloudy | 9 to 13 mph S | 28% |
| Thursday Night | 58°F | Mostly Cloudy then Chance Light Rain | 1 to 8 mph SW | 31% |
| Friday | 70°F | Slight Chance Light Rain | 5 mph N | 23% |
| Friday Night | 48°F | Slight Chance Light Rain then Partly Cloudy | 2 to 12 mph N | 20% |
| Saturday | 62°F | Mostly Sunny | 12 to 15 mph NW | 7% |
| Saturday Night | 42°F | Partly Cloudy | 10 to 14 mph NW | 3% |
| Sunday | 62°F | Mostly Sunny | 6 to 14 mph NW | 2% |
| Sunday Night | 41°F | Mostly Clear | 5 to 9 mph NW | 0% |
| Monday | 63°F | Sunny | 6 to 14 mph NW | 0% |
| Monday Night | 39°F | Mostly Clear | 2 to 6 mph W | 0% |
| Tuesday | 68°F | Mostly Sunny | 3 to 8 mph SW | 1% |
| Tuesday Night | 42°F | Mostly Clear | 2 to 6 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov) for Chantilly (38.889, -77.442). Updated through the day.
Growing snapshot for Chantilly
Last spring frost
Apr 15
First fall frost
Oct 24
Growing season
194 days
Hardiness zone
7b
More local growing data for Chantilly: nearby ZIP 20151 weather · frost dates · planting calendar · Virginia frost dates
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Climate data from the nearest NOAA station, Washington Dc Dulles Ap, Va (3.2 mi from Chantilly). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.