North York, PA 17318 Frost Dates
Frost dates for North York, PA, ZIP 17318
Around 04/26 is the usual last spring frost, about 241 days away. The first fall frost typically arrives around 10/19, about 177 frost-free days later.
The USDA Plant Hardiness Zone Map puts North York 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 North York 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 04/26 isn't a guarantee
04/26 is the middle of 30 years of NOAA records, not a promise. Plant by 04/07 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 North York compares
North York's growing season runs about 177 days, ranking 26,135 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 954 of 2,088.
Learn more
the frost range explains how to read the range around North York's dates instead of trusting one, and local microclimates explains what one yard in North York can differ from the 17318 normal.