Port Byron, NY 13140 Frost Dates
Frost dates for Port Byron, NY, ZIP 13140
The last spring frost here typically falls around 05/06, about 251 days from today. The first fall frost typically arrives around 10/10, about 158 frost-free days later.
The USDA Plant Hardiness Zone Map puts Port Byron in Zone 6a (-10 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 6a around Port Byron 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.
Why 05/06 isn't a guarantee
05/06 is the middle of 30 years of NOAA records, not a promise. Plant by 04/24 and you're betting against frost in roughly 9 years out of 10. 05/21 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Port Byron compares
About 158 days separate Port Byron's last and first frost, putting it 33,053 of 40,283 ZIP codes nationally. Within NY, it ranks 1,186 of 1,951.
Learn more
local microclimates explains what one yard in Port Byron can differ from the 13140 normal, and zone vs. frost date explains why Zone 6a and Port Byron's frost date answer different questions.