Chantilly, VA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Chantilly, a community in Fairfax County, Virginia.
Tonight
61°F
Mostly Cloudy
Mostly cloudy, with a low around 61. North wind around 7 mph.
7-day forecast for Chantilly
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 61°F | Mostly Cloudy | 7 mph N | 2% |
| Saturday | 79°F | Partly Sunny | 7 mph E | 10% |
| Saturday Night | 67°F | Mostly Cloudy | 7 mph SE | 10% |
| Sunday | 84°F | Partly Sunny then Chance Showers And Thunderstorms | 6 to 13 mph S | 47% |
| Sunday Night | 65°F | Showers And Thunderstorms Likely | 3 to 9 mph NW | 61% |
| Monday | 75°F | Chance Rain Showers | 7 to 12 mph NE | 41% |
| Monday Night | 61°F | Rain Showers Likely | 6 to 10 mph NE | 58% |
| Tuesday | 67°F | Rain Showers Likely | 12 mph NE | 62% |
| Tuesday Night | 56°F | Rain Showers Likely | 12 mph NE | 62% |
| Wednesday | 63°F | Rain Showers Likely | 12 mph NE | 56% |
| Wednesday Night | 56°F | Chance Showers And Thunderstorms | 10 mph NE | 52% |
| Thursday | 65°F | Chance Showers And Thunderstorms | 12 mph N | 52% |
| Thursday Night | 55°F | Chance Showers And Thunderstorms | 5 to 8 mph N | 35% |
| Friday | 69°F | Slight Chance Rain Showers | 10 mph N | 23% |
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 Sep 19, 2026.