Fairfax, VA 22152 Frost Dates
When can you plant in Fairfax, VA?
Around 04/14 is the usual last spring frost, about 229 days away. The first fall frost typically arrives around 10/29, about 198 frost-free days later.
The USDA Plant Hardiness Zone Map puts Fairfax in Zone 7b (5 to 10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's 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
Fairfax's growing season runs about 198 days, ranking 18,338 of 40,283 US ZIP codes measured here, longest to shortest. Within VA, it ranks 678 of 1,178.
Learn more
zone vs. frost date covers why Zone 7b and Fairfax's frost date answer different questions. the frost range covers how to read the range around Fairfax's dates instead of trusting one.