Fairfax County, Virginia · Frost dates
Fairfax County frost dates.
First-frost, last-frost, and growing-season length for Fairfax County, Virginia. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 7a
32°F — light freeze
Last spring frost
- 10%
- 04-28
- 20%
- 04-23
- 50%
- 04-14
- 80%
- 04-03
- 90%
- 03-30
First fall frost
- 10%
- 10-17
- 20%
- 10-21
- 50%
- 10-29
- 80%
- 11-06
- 90%
- 11-11
28°F — killing freeze
Last spring freeze
- 10%
- 04-16
- 20%
- 04-11
- 50%
- 04-02
- 80%
- 03-23
- 90%
- 03-18
First fall freeze
- 10%
- 10-26
- 20%
- 11-01
- 50%
- 11-08
- 80%
- 11-18
- 90%
- 11-23
Growing season length (days, 28°F threshold)
- Short year
- 193
- Median
- 220
- Long year
- 250
Source NOAA station
VIENNA, VA US
4.4 mi · 30 yrs of record (1991–2020) · 418 ft elev.
Data from VIENNA, VA US, 4.4 miles away with 30-year NOAA record (1991-2020).
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