Collegeville, PA 19430 Frost Dates
19430, near Collegeville, PA: the frost window
The last spring frost here typically falls around 04/24, about 239 days from today. Fall's first freeze usually shows up around 10/15, roughly 173 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 Collegeville, not a forecast for this year.
Stretching the season past the first frost
Collegeville's growing season runs out in roughly 7 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/24 isn't a guarantee
04/24 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/10 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.
Collegeville against the rest of the dataset
Collegeville's growing season runs about 173 days, ranking 27,864 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 1,317 of 2,088.
Learn more
Two guides worth reading on 19430: local microclimates, on what one yard in Collegeville can differ from the 19430 normal, and zone vs. frost date, on why Zone 7a and Collegeville's frost date answer different questions.