Dunellen, NJ 08812 Frost Dates
Frost dates for Dunellen, NJ, ZIP 08812
The last spring frost here typically falls around 04/11, about 226 days from today. The first fall frost typically arrives around 10/31, about 202 frost-free days later.
The USDA Plant Hardiness Zone Map puts Dunellen 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 Dunellen 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 04/11 isn't a guarantee
04/11 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. 04/28 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Dunellen compares
Dunellen's growing season runs about 202 days, ranking 17,208 of 40,283 US ZIP codes measured here, longest to shortest. Within NJ, it ranks 410 of 906.
Learn more
local microclimates explains what one yard in Dunellen can differ from the 08812 normal, and zone vs. frost date explains why Zone 7a and Dunellen's frost date answer different questions.