Tenafly, NJ 07670 Frost Dates
07670, near Tenafly, NJ: the frost window
The last spring frost here typically falls around 04/01, about 216 days from today. Fall's first freeze usually shows up around 11/16, roughly 230 days after the last spring frost.
Zone 7b (5 to 10°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 Tenafly, not a forecast for this year.
Stretching the season past the first frost
Tenafly's growing season runs out in roughly 11 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
04/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/19 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/12 and only about 1 year in 10 sees frost after that.
Tenafly against the rest of the dataset
Tenafly's growing season runs about 230 days, ranking 10,334 of 40,283 US ZIP codes measured here, longest to shortest. Within NJ, it ranks 186 of 906.
Learn more
Two guides worth reading on 07670: local microclimates, on what one yard in Tenafly can differ from the 07670 normal, and zone vs. frost date, on why Zone 7b and Tenafly's frost date answer different questions.