Portville, NY 14788 Frost Dates
Frost dates for Portville, NY, ZIP 14788
Around 05/07 is the usual last spring frost, about 252 days away. The first fall frost typically arrives around 10/11, about 156 frost-free days later.
The USDA Plant Hardiness Zone Map puts Portville in Zone 5b (-15 to -10°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 5b around Portville 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
05/07 is the middle of 30 years of NOAA records, not a promise. Plant by 04/23 and you're betting against frost in roughly 9 years out of 10. 05/22 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Portville compares
At roughly 156 frost-free days, Portville places 33,743 of 40,283 ZIP codes in this dataset. Within NY, it ranks 1,336 of 1,951.
Learn more
the frost range explains how to read the range around Portville's dates instead of trusting one, and local microclimates explains what one yard in Portville can differ from the 14788 normal.