Port Byron, NY 13117 Frost Dates
Frost dates for Port Byron, NY, ZIP 13117
Around 05/06 is the usual last spring frost, about 251 days away. The first fall frost typically arrives around 10/10, about 158 frost-free days later.
Port Byron sits in USDA Zone 6a (-10 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 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.
The actual range around Port Byron's last frost
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
At roughly 158 frost-free days, Port Byron places 33,052 of 40,283 ZIP codes in this dataset. Within NY, it ranks 1,185 of 1,951.
Learn more
zone vs. frost date explains why Zone 6a and Port Byron's frost date answer different questions, and the frost range explains how to read the range around Port Byron's dates instead of trusting one.