Fairfax, VA 22035 Frost Dates
When can you plant in Fairfax, VA?
Typically, the last spring freeze lands around 04/14, roughly 229 days out. The first fall frost typically arrives around 10/29, about 198 frost-free days later.
Fairfax sits in USDA Zone 7b (5 to 10°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
About 9 weeks of growing season left in Fairfax before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Fairfax's last frost
04/14 is the middle of 30 years of NOAA records, not a promise. Plant by 03/30 and you're betting against frost in roughly 9 years out of 10. 04/28 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Fairfax compares
At roughly 198 frost-free days, Fairfax places 18,326 of 40,283 ZIP codes in this dataset. Within VA, it ranks 666 of 1,178.
Learn more
local microclimates covers what one yard in Fairfax can differ from the 22035 normal. zone vs. frost date covers why Zone 7b and Fairfax's frost date answer different questions.