Mountville, PA 17554 Frost Dates
Frost dates for Mountville, PA, ZIP 17554
Typically, the last spring freeze lands around 04/30, roughly 245 days out. The first fall frost typically arrives around 10/10, about 162 frost-free days later.
Mountville 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.
What to do before the first frost
Zone 7a around Mountville has about 6 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.
How much risk comes with planting early here
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/16 and you're betting against frost in roughly 9 years out of 10. 05/13 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mountville compares
Mountville's growing season runs about 162 days, ranking 31,735 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 1,658 of 2,088.
Learn more
local microclimates explains what one yard in Mountville can differ from the 17554 normal, and zone vs. frost date explains why Zone 7a and Mountville's frost date answer different questions.