Warrenton, VA 20186 Frost Dates
Frost dates for Warrenton, VA, ZIP 20186
Around 04/16 is the usual last spring frost, about 231 days away. 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.
How much risk comes with planting early here
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 20,220 of 40,283 ZIP codes nationally. Within VA, it ranks 790 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 20186 normal.