Summerville, PA 15864 Frost Dates
When can you plant in Summerville, PA?
Typically, the last spring freeze lands around 05/10, roughly 255 days out. The first fall frost typically arrives around 10/12, about 155 frost-free days later.
The USDA Plant Hardiness Zone Map puts Summerville in Zone 6a (-10 to -5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 6 weeks of growing season left in Summerville before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/10 isn't a guarantee
05/10 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. 05/28 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Summerville compares
At roughly 155 frost-free days, Summerville places 34,079 of 40,283 ZIP codes in this dataset. Within PA, it ranks 1,811 of 2,088.
Learn more
local microclimates covers what one yard in Summerville can differ from the 15864 normal. zone vs. frost date covers why Zone 6a and Summerville's frost date answer different questions.