Warrenton, VA 20128 Frost Dates
Frost dates for Warrenton, VA, ZIP 20128
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.
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 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 Warrenton's last frost
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
Warrenton's growing season runs about 192 days, ranking 20,219 of 40,283 US ZIP codes measured here, longest to shortest. Within VA, it ranks 789 of 1,178.
Learn more
zone vs. frost date explains why Zone 7a and Warrenton's frost date answer different questions, and the frost range explains how to read the range around Warrenton's dates instead of trusting one.