Lewisberry, PA 17339 Frost Dates
When can you plant in Lewisberry, PA?
The last spring frost here typically falls around 04/09, about 224 days from today. The first fall frost typically arrives around 11/01, about 205 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 Lewisberry, not a forecast for this year.
What to do before the first frost
About 9 weeks of growing season left in Lewisberry before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/09 is the middle of 30 years of NOAA records, not a promise. Plant by 03/27 and you're betting against frost in roughly 9 years out of 10. 04/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Lewisberry compares
At roughly 205 frost-free days, Lewisberry places 16,394 of 40,283 ZIP codes in this dataset. Within PA, it ranks 185 of 2,088.
Learn more
local microclimates covers what one yard in Lewisberry can differ from the 17339 normal. zone vs. frost date covers why Zone 7a and Lewisberry's frost date answer different questions.