Bordentown, NJ 08515 Frost Dates
08515, near Bordentown, NJ: the frost window
Around 04/25 is the usual last spring frost, about 240 days away. Fall's first freeze usually shows up around 10/16, roughly 173 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Bordentown 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
Bordentown's growing season runs out in roughly 7 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/25 isn't a guarantee
04/25 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/12 and only about 1 year in 10 sees frost after that.
Bordentown against the rest of the dataset
About 173 days separate Bordentown's last and first frost, putting it 27,885 of 40,283 ZIP codes nationally. Within NJ, it ranks 844 of 906.
Learn more
Two guides worth reading on 08515: zone vs. frost date, on why Zone 7a and Bordentown's frost date answer different questions, and the frost range, on how to read the range around Bordentown's dates instead of trusting one.