Shippingport, PA 15077 Frost Dates
Frost dates for Shippingport, PA, ZIP 15077
Typically, the last spring freeze lands around 04/28, roughly 243 days out. The first fall frost typically arrives around 10/18, about 172 frost-free days later.
Zone 6b (-5 to 0°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 Shippingport, not a forecast for this year.
What to do before the first frost
Zone 6b around Shippingport 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.
How much risk comes with planting early here
04/28 is the middle of 30 years of NOAA records, not a promise. Plant by 04/15 and you're betting against frost in roughly 9 years out of 10. 05/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Shippingport compares
About 172 days separate Shippingport's last and first frost, putting it 28,529 of 40,283 ZIP codes nationally. Within PA, it ranks 1,415 of 2,088.
Learn more
local microclimates explains what one yard in Shippingport can differ from the 15077 normal, and zone vs. frost date explains why Zone 6b and Shippingport's frost date answer different questions.