Gratz, PA 17030 Frost Dates
Frost dates for Gratz, PA, ZIP 17030
Typically, the last spring freeze lands around 04/27, roughly 242 days out. The first fall frost typically arrives around 10/16, about 172 frost-free days later.
Gratz sits in USDA Zone 6b (-5 to 0°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 6b around Gratz has about 7 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 04/27 isn't a guarantee
04/27 is the middle of 30 years of NOAA records, not a promise. Plant by 04/13 and you're betting against frost in roughly 9 years out of 10. 05/12 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Gratz compares
At roughly 172 frost-free days, Gratz places 28,419 of 40,283 ZIP codes in this dataset. Within PA, it ranks 1,396 of 2,088.
Learn more
local microclimates explains what one yard in Gratz can differ from the 17030 normal, and zone vs. frost date explains why Zone 6b and Gratz's frost date answer different questions.