Collegeville, PA 19426 Frost Dates
Frost dates for Collegeville, PA, ZIP 19426
The last spring frost here typically falls around 04/24, about 239 days from today. The first fall frost typically arrives around 10/15, about 173 frost-free days later.
The USDA Plant Hardiness Zone Map puts Collegeville in Zone 7a (0 to 5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 7a around Collegeville has about 7 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 04/24 isn't a guarantee
04/24 is the middle of 30 years of NOAA records, not a promise. Plant by 04/10 and you're betting against frost in roughly 9 years out of 10. 05/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Collegeville compares
Collegeville's growing season runs about 173 days, ranking 27,863 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 1,316 of 2,088.
Learn more
the frost range explains how to read the range around Collegeville's dates instead of trusting one, and local microclimates explains what one yard in Collegeville can differ from the 19426 normal.