Trenton, NJ 08618 Frost Dates
08618, near Trenton, NJ: the frost window
Typically, the last spring freeze lands around 04/17, roughly 232 days out. Fall's first freeze usually shows up around 10/28, roughly 192 days after the last spring frost.
Trenton sits in USDA Zone 7b (5 to 10°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.
Stretching the season past the first frost
Trenton's growing season runs out in roughly 9 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Trenton's last frost
04/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/06 and only about 1 year in 10 sees frost after that.
Trenton against the rest of the dataset
Trenton's growing season runs about 192 days, ranking 20,120 of 40,283 US ZIP codes measured here, longest to shortest. Within NJ, it ranks 534 of 906.
Learn more
Two guides worth reading on 08618: the frost range, on how to read the range around Trenton's dates instead of trusting one, and local microclimates, on what one yard in Trenton can differ from the 08618 normal.