Jamestown, PA 16134 Frost Dates
Frost dates for Jamestown, PA, ZIP 16134
Typically, the last spring freeze lands around 04/30, roughly 245 days out. The first fall frost typically arrives around 10/23, about 177 frost-free days later.
Jamestown sits in USDA Zone 6a (-10 to -5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 6a around Jamestown has about 8 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Jamestown's last frost
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
At roughly 177 frost-free days, Jamestown places 26,219 of 40,283 ZIP codes in this dataset. Within PA, it ranks 978 of 2,088.
Learn more
zone vs. frost date explains why Zone 6a and Jamestown's frost date answer different questions, and the frost range explains how to read the range around Jamestown's dates instead of trusting one.