Warrenton, VA 20119 Frost Dates
Frost dates for Warrenton, VA, ZIP 20119
Around 03/28 is the usual last spring frost, about 212 days away. The first fall frost typically arrives around 11/08, about 226 frost-free days later.
The USDA Plant Hardiness Zone Map puts Warrenton in Zone 7a (0 to 5°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 7a around Warrenton has about 10 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 03/28 isn't a guarantee
03/28 is the middle of 30 years of NOAA records, not a promise. Plant by 03/14 and you're betting against frost in roughly 9 years out of 10. 04/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Warrenton compares
Warrenton's growing season runs about 226 days, ranking 11,170 of 40,283 US ZIP codes measured here, longest to shortest. Within VA, it ranks 138 of 1,178.
Learn more
the frost range explains how to read the range around Warrenton's dates instead of trusting one, and local microclimates explains what one yard in Warrenton can differ from the 20119 normal.