Fairfax, VA 22118 Frost Dates
Frost dates for Fairfax, VA, ZIP 22118
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.
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
Zone 7b around Fairfax has about 9 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
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 18,334 of 40,283 ZIP codes in this dataset. Within VA, it ranks 674 of 1,178.
Learn more
zone vs. frost date explains why Zone 7b and Fairfax's frost date answer different questions, and the frost range explains how to read the range around Fairfax's dates instead of trusting one.