Fairfax, VA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fairfax, a city in Fairfax County, Virginia.
This Afternoon
71°F
Sunny
Sunny, with a high near 71. South wind around 8 mph.
7-day forecast for Fairfax
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Sunny | 8 mph S | 2% |
| Tonight | 52°F | Mostly Clear | 6 mph S | 2% |
| Wednesday | 74°F | Mostly Sunny | 5 to 10 mph S | 2% |
| Wednesday Night | 62°F | Mostly Cloudy then Chance Light Rain | 6 to 9 mph S | 40% |
| Thursday | 75°F | Chance Light Rain | 10 mph S | 36% |
| Thursday Night | 62°F | Chance Light Rain | 2 to 7 mph SW | 53% |
| Friday | 70°F | Rain Likely | 6 mph NW | 68% |
| Friday Night | 52°F | Light Rain Likely then Mostly Cloudy | 2 to 7 mph NW | 68% |
| Saturday | 64°F | Sunny | 8 to 12 mph NW | 10% |
| Saturday Night | 45°F | Partly Cloudy | 8 mph NW | 10% |
| Sunday | 61°F | Mostly Sunny | 3 to 8 mph NW | 7% |
| Sunday Night | 43°F | Partly Cloudy then Slight Chance Light Rain | 3 to 7 mph NW | 15% |
| Monday | 61°F | Slight Chance Light Rain then Mostly Sunny | 8 to 13 mph NW | 15% |
| Monday Night | 41°F | Mostly Clear | 3 to 7 mph W | 8% |
Forecast source: National Weather Service (api.weather.gov) for Fairfax (38.853, -77.299). Updated through the day.
Growing snapshot for Fairfax
Last spring frost
Apr 14
First fall frost
Oct 29
Growing season
198 days
Hardiness zone
7b
More local growing data for Fairfax: nearby ZIP 22032 weather · frost dates · planting calendar · Virginia frost dates
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Crosspointe
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Dranesville
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Fair Lakes
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Fairfax Station
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Fort Belvoir
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Climate data from the nearest NOAA station, Vienna, Va (5.2 mi from Fairfax). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.