Stoystown, PA 15563 Frost Dates
Stoystown, PA: when does the frost end?
The last spring frost here typically falls around 04/29, about 244 days from today. Fall's first freeze usually shows up around 10/21, roughly 176 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Stoystown in Zone 6a (-10 to -5°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 8 weeks until Stoystown's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/29 isn't a guarantee
04/29 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/17 and only about 1 year in 10 sees frost after that.
Stoystown against the rest of the dataset
About 176 days separate Stoystown's last and first frost, putting it 26,631 of 40,283 ZIP codes nationally. Within PA, it ranks 1,093 of 2,088.
Learn more
Before leaning on 15563's figures: the frost range explains how to read the range around Stoystown's dates instead of trusting one, while local microclimates explains what one yard in Stoystown can differ from the 15563 normal.