Portville, NY 14770 Frost Dates
Portville, NY: when does the frost end?
The last spring frost here typically falls around 05/07, about 252 days from today. Fall's first freeze usually shows up around 10/11, roughly 156 days after the last spring frost.
Zone 5b (-15 to -10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Portville, not a forecast for this year.
Stretching the season past the first frost
With roughly 6 weeks until Portville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Portville's last frost
05/07 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/22 and only about 1 year in 10 sees frost after that.
Portville against the rest of the dataset
About 156 days separate Portville's last and first frost, putting it 33,742 of 40,283 ZIP codes nationally. Within NY, it ranks 1,335 of 1,951.
Learn more
Before leaning on 14770's figures: local microclimates explains what one yard in Portville can differ from the 14770 normal, while zone vs. frost date explains why Zone 5b and Portville's frost date answer different questions.