Palmyra, PA 17010 Frost Dates
When can you plant in Palmyra, PA?
Typically, the last spring freeze lands around 04/20, roughly 235 days out. The first fall frost typically arrives around 10/25, about 185 frost-free days later.
Zone 7a (0 to 5°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 Palmyra, not a forecast for this year.
What to do before the first frost
About 8 weeks of growing season left in Palmyra before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Palmyra's last frost
04/20 is the middle of 30 years of NOAA records, not a promise. Plant by 04/05 and you're betting against frost in roughly 9 years out of 10. 05/07 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Palmyra compares
At roughly 185 frost-free days, Palmyra places 23,122 of 40,283 ZIP codes in this dataset. Within PA, it ranks 691 of 2,088.
Learn more
local microclimates covers what one yard in Palmyra can differ from the 17010 normal. zone vs. frost date covers why Zone 7a and Palmyra's frost date answer different questions.