Port Royal, VA 22547 Frost Dates
Frost dates for Port Royal, VA, ZIP 22547
The last spring frost here typically falls around 03/28, about 212 days from today. The first fall frost typically arrives around 11/08, about 226 frost-free days later.
Port Royal sits in USDA Zone 7b (5 to 10°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 7b around Port Royal 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.
How much risk comes with planting early here
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 Port Royal compares
At roughly 226 frost-free days, Port Royal places 11,311 of 40,283 ZIP codes in this dataset. Within VA, it ranks 167 of 1,178.
Learn more
local microclimates explains what one yard in Port Royal can differ from the 22547 normal, and zone vs. frost date explains why Zone 7b and Port Royal's frost date answer different questions.