Hopewell, NJ 08525 Frost Dates
Frost dates for Hopewell, NJ, ZIP 08525
The last spring frost here typically falls around 04/10, about 225 days from today. The first fall frost typically arrives around 11/01, about 202 frost-free days later.
The USDA Plant Hardiness Zone Map puts Hopewell 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 Hopewell has about 9 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.
Why 04/10 isn't a guarantee
04/10 is the middle of 30 years of NOAA records, not a promise. Plant by 03/30 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 Hopewell compares
Hopewell's growing season runs about 202 days, ranking 17,269 of 40,283 US ZIP codes measured here, longest to shortest. Within NJ, it ranks 419 of 906.
Learn more
zone vs. frost date explains why Zone 7a and Hopewell's frost date answer different questions, and the frost range explains how to read the range around Hopewell's dates instead of trusting one.