Warrenton, VA 22724 Frost Dates
Frost dates for Warrenton, VA, ZIP 22724
Typically, the last spring freeze lands around 04/16, roughly 231 days out. The first fall frost typically arrives around 10/27, about 192 frost-free days later.
Zone 7a (0 to 5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Warrenton, not a forecast for this year.
What to do before the first frost
Zone 7a around Warrenton 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.
Why 04/16 isn't a guarantee
04/16 is the middle of 30 years of NOAA records, not a promise. Plant by 04/01 and you're betting against frost in roughly 9 years out of 10. 05/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Warrenton compares
About 192 days separate Warrenton's last and first frost, putting it 20,221 of 40,283 ZIP codes nationally. Within VA, it ranks 791 of 1,178.
Learn more
local microclimates explains what one yard in Warrenton can differ from the 22724 normal, and zone vs. frost date explains why Zone 7a and Warrenton's frost date answer different questions.