Harrison, NJ 07029 Frost Dates
Frost dates for Harrison, NJ, ZIP 07029
Typically, the last spring freeze lands around 04/04, roughly 219 days out. The first fall frost typically arrives around 11/06, about 216 frost-free days later.
Zone 7b (5 to 10°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 Harrison, not a forecast for this year.
What to do before the first frost
Zone 7b around Harrison has about 10 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 04/04 isn't a guarantee
04/04 is the middle of 30 years of NOAA records, not a promise. Plant by 03/23 and you're betting against frost in roughly 9 years out of 10. 04/16 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Harrison compares
At roughly 216 frost-free days, Harrison places 13,735 of 40,283 ZIP codes in this dataset. Within NJ, it ranks 287 of 906.
Learn more
local microclimates explains what one yard in Harrison can differ from the 07029 normal, and zone vs. frost date explains why Zone 7b and Harrison's frost date answer different questions.