Bernville, PA 19559 Frost Dates
19559, near Bernville, PA: the frost window
Typically, the last spring freeze lands around 04/10, roughly 225 days out. Fall's first freeze usually shows up around 10/31, roughly 202 days after the last spring frost.
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 Bernville, not a forecast for this year.
Stretching the season past the first frost
Bernville's growing season runs out in roughly 9 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/10 isn't a guarantee
04/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/29 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/26 and only about 1 year in 10 sees frost after that.
Bernville against the rest of the dataset
About 202 days separate Bernville's last and first frost, putting it 17,291 of 40,283 ZIP codes nationally. Within PA, it ranks 231 of 2,088.
Learn more
Two guides worth reading on 19559: zone vs. frost date, on why Zone 7a and Bernville's frost date answer different questions, and the frost range, on how to read the range around Bernville's dates instead of trusting one.