Jamestown, PA 16110 Frost Dates
When can you plant in Jamestown, PA?
The last spring frost here typically falls around 04/30, about 245 days from today. The first fall frost typically arrives around 10/23, about 177 frost-free days later.
The USDA Plant Hardiness Zone Map puts Jamestown 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 8 weeks of growing season left in Jamestown 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
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/16 and you're betting against frost in roughly 9 years out of 10. 05/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Jamestown compares
About 177 days separate Jamestown's last and first frost, putting it 26,218 of 40,283 ZIP codes nationally. Within PA, it ranks 977 of 2,088.
Learn more
local microclimates covers what one yard in Jamestown can differ from the 16110 normal. zone vs. frost date covers why Zone 6a and Jamestown's frost date answer different questions.