Port Royal, VA 22535 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.
The USDA Plant Hardiness Zone Map puts Port Royal in Zone 7b (5 to 10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's 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
At roughly 226 frost-free days, Port Royal places 11,308 of 40,283 ZIP codes in this dataset. Within VA, it ranks 164 of 1,178.
Learn more
Before leaning on 22535's figures: zone vs. frost date explains why Zone 7b and Port Royal's frost date answer different questions, while the frost range explains how to read the range around Port Royal's dates instead of trusting one.