Port Royal, VA 22526 Frost Dates
Port Royal, VA: when does the frost end?
Typically, the last spring freeze lands around 03/28, roughly 212 days out. Fall's first freeze usually shows up around 11/08, roughly 226 days after the last spring frost.
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.
Stretching the season past the first frost
With roughly 10 weeks until Port Royal's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 03/28 isn't a guarantee
03/28 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/08 and only about 1 year in 10 sees frost after that.
Port Royal against the rest of the dataset
Port Royal's growing season runs about 226 days, ranking 11,307 of 40,283 US ZIP codes measured here, longest to shortest. Within VA, it ranks 163 of 1,178.
Learn more
Before leaning on 22526's figures: the frost range explains how to read the range around Port Royal's dates instead of trusting one, while local microclimates explains what one yard in Port Royal can differ from the 22526 normal.