Pottstown, PA 19464 Frost Dates
Pottstown, PA: when does the frost end?
The last spring frost here typically falls around 04/20, about 235 days from today. Fall's first freeze usually shows up around 10/23, roughly 186 days after the last spring frost.
Pottstown sits in USDA Zone 7a (0 to 5°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 Pottstown's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/20 isn't a guarantee
04/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/05 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/06 and only about 1 year in 10 sees frost after that.
Pottstown against the rest of the dataset
Pottstown's growing season runs about 186 days, ranking 22,721 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 639 of 2,088.
Learn more
Before leaning on 19464's figures: local microclimates explains what one yard in Pottstown can differ from the 19464 normal, while zone vs. frost date explains why Zone 7a and Pottstown's frost date answer different questions.