Stewartstown, PA 17363 Frost Dates
When can you plant in Stewartstown, PA?
The last spring frost here typically falls around 04/19, about 234 days from today. The first fall frost typically arrives around 10/25, about 188 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 Stewartstown, not a forecast for this year.
What to do before the first frost
About 8 weeks of growing season left in Stewartstown before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Stewartstown's last frost
04/19 is the middle of 30 years of NOAA records, not a promise. Plant by 04/04 and you're betting against frost in roughly 9 years out of 10. 05/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Stewartstown compares
Stewartstown's growing season runs about 188 days, ranking 22,069 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 585 of 2,088.
Learn more
local microclimates covers what one yard in Stewartstown can differ from the 17363 normal. zone vs. frost date covers why Zone 7a and Stewartstown's frost date answer different questions.