Port Royal, PA 17014 Frost Dates
Port Royal, PA: when does the frost end?
The last spring frost here typically falls around 04/21, about 236 days from today. Fall's first freeze usually shows up around 10/24, roughly 185 days after the last spring frost.
Port Royal sits in USDA Zone 6b (-5 to 0°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 8 weeks until Port Royal's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/09 and only about 1 year in 10 sees frost after that.
Port Royal against the rest of the dataset
At roughly 185 frost-free days, Port Royal places 23,249 of 40,283 ZIP codes in this dataset. Within PA, it ranks 719 of 2,088.
Learn more
Before leaning on 17014'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 17014 normal.