Trenton, NJ 08604 Frost Dates
Frost dates for Trenton, NJ, ZIP 08604
Typically, the last spring freeze lands around 04/17, roughly 232 days out. The first fall frost typically arrives around 10/28, about 192 frost-free days later.
Trenton 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 Trenton 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.
The actual range around Trenton's last frost
04/17 is the middle of 30 years of NOAA records, not a promise. Plant by 04/02 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 Trenton compares
At roughly 192 frost-free days, Trenton places 20,113 of 40,283 ZIP codes in this dataset. Within NJ, it ranks 527 of 906.
Learn more
the frost range explains how to read the range around Trenton's dates instead of trusting one, and local microclimates explains what one yard in Trenton can differ from the 08604 normal.