Blossburg, PA 16917 Frost Dates
Frost dates for Blossburg, PA, ZIP 16917
Typically, the last spring freeze lands around 05/09, roughly 254 days out. The first fall frost typically arrives around 10/12, about 155 frost-free days later.
Blossburg 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 Blossburg 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 05/09 isn't a guarantee
05/09 is the middle of 30 years of NOAA records, not a promise. Plant by 04/25 and you're betting against frost in roughly 9 years out of 10. 05/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Blossburg compares
At roughly 155 frost-free days, Blossburg places 34,010 of 40,283 ZIP codes in this dataset. Within PA, it ranks 1,788 of 2,088.
Learn more
zone vs. frost date explains why Zone 6a and Blossburg's frost date answer different questions, and the frost range explains how to read the range around Blossburg's dates instead of trusting one.