Warrenton, VA 20139 Frost Dates
When can you plant in Warrenton, VA?
Around 04/15 is the usual last spring frost, about 230 days away. The first fall frost typically arrives around 10/24, about 194 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
About 8 weeks of growing season left in Warrenton before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Warrenton's last frost
04/15 is the middle of 30 years of NOAA records, not a promise. Plant by 03/31 and you're betting against frost in roughly 9 years out of 10. 04/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Warrenton compares
Warrenton's growing season runs about 194 days, ranking 19,461 of 40,283 US ZIP codes measured here, longest to shortest. Within VA, it ranks 766 of 1,178.
Learn more
local microclimates covers what one yard in Warrenton can differ from the 20139 normal. zone vs. frost date covers why Zone 7a and Warrenton's frost date answer different questions.