Curwensville, PA 16863 Frost Dates
Frost dates for Curwensville, PA, ZIP 16863
Typically, the last spring freeze lands around 05/04, roughly 249 days out. The first fall frost typically arrives around 10/11, about 161 frost-free days later.
Zone 6a (-10 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 Curwensville, not a forecast for this year.
What to do before the first frost
Zone 6a around Curwensville has about 6 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 Curwensville's last frost
05/04 is the middle of 30 years of NOAA records, not a promise. Plant by 04/19 and you're betting against frost in roughly 9 years out of 10. 05/22 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Curwensville compares
About 161 days separate Curwensville's last and first frost, putting it 32,057 of 40,283 ZIP codes nationally. Within PA, it ranks 1,679 of 2,088.
Learn more
local microclimates explains what one yard in Curwensville can differ from the 16863 normal, and zone vs. frost date explains why Zone 6a and Curwensville's frost date answer different questions.