Trenton, NJ 08610 Frost Dates
08610, near Trenton, NJ: the frost window
Around 04/17 is the usual last spring frost, about 232 days away. Fall's first freeze usually shows up around 10/28, roughly 192 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Trenton in Zone 7a (0 to 5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's 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.
How much risk comes with planting early here
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
About 192 days separate Trenton's last and first frost, putting it 20,118 of 40,283 ZIP codes nationally. Within NJ, it ranks 532 of 906.
Learn more
Two guides worth reading on 08610: local microclimates, on what one yard in Trenton can differ from the 08610 normal, and zone vs. frost date, on why Zone 7a and Trenton's frost date answer different questions.