Denver, PA 17517 Frost Dates
Frost dates for Denver, PA, ZIP 17517
The last spring frost here typically falls around 04/18, about 233 days from today. The first fall frost typically arrives around 10/25, about 186 frost-free days later.
The USDA Plant Hardiness Zone Map puts Denver in Zone 7a (0 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
Zone 7a around Denver 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 Denver's last frost
04/18 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. 05/05 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Denver compares
Denver's growing season runs about 186 days, ranking 22,801 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 665 of 2,088.
Learn more
local microclimates explains what one yard in Denver can differ from the 17517 normal, and zone vs. frost date explains why Zone 7a and Denver's frost date answer different questions.