Collegeville, PA 19474 Frost Dates
19474, near Collegeville, PA: the frost window
Typically, the last spring freeze lands around 04/24, roughly 239 days out. Fall's first freeze usually shows up around 10/15, roughly 173 days after the last spring frost.
Collegeville 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
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.
How much risk comes with planting early here
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
At roughly 173 frost-free days, Collegeville places 27,865 of 40,283 ZIP codes in this dataset. Within PA, it ranks 1,318 of 2,088.
Learn more
Two guides worth reading on 19474: zone vs. frost date, on why Zone 7a and Collegeville's frost date answer different questions, and the frost range, on how to read the range around Collegeville's dates instead of trusting one.