Highland Park, NJ 08817 Frost Dates
Frost dates for Highland Park, NJ, ZIP 08817
Typically, the last spring freeze lands around 04/11, roughly 226 days out. The first fall frost typically arrives around 10/31, about 202 frost-free days later.
Zone 7a (0 to 5°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 Highland Park, not a forecast for this year.
What to do before the first frost
Zone 7a around Highland Park 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 Highland Park compares
Highland Park's growing season runs about 202 days, ranking 17,165 of 40,283 US ZIP codes measured here, longest to shortest. Within NJ, it ranks 396 of 906.
Learn more
zone vs. frost date explains why Zone 7a and Highland Park's frost date answer different questions, and the frost range explains how to read the range around Highland Park's dates instead of trusting one.