Rockleigh, NJ 10964 Frost Dates
Frost dates for Rockleigh, NJ, ZIP 10964
Typically, the last spring freeze lands around 04/20, roughly 235 days out. The first fall frost typically arrives around 10/26, about 189 frost-free days later.
Rockleigh sits in USDA Zone 7a (0 to 5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 7a around Rockleigh 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.
Why 04/20 isn't a guarantee
04/20 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. 05/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Rockleigh compares
At roughly 189 frost-free days, Rockleigh places 21,721 of 40,283 ZIP codes in this dataset. Within NJ, it ranks 655 of 906.
Learn more
the frost range explains how to read the range around Rockleigh's dates instead of trusting one, and local microclimates explains what one yard in Rockleigh can differ from the 10964 normal.