Florham Park, NJ 07932 Frost Dates
07932, near Florham Park, NJ: the frost window
Typically, the last spring freeze lands around 04/18, roughly 233 days out. Fall's first freeze usually shows up around 10/27, roughly 189 days after the last spring frost.
Zone 7a (0 to 5°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 Florham Park, not a forecast for this year.
Stretching the season past the first frost
Florham Park'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.
Why 04/18 isn't a guarantee
04/18 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/03 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.
Florham Park against the rest of the dataset
At roughly 189 frost-free days, Florham Park places 21,451 of 40,283 ZIP codes in this dataset. Within NJ, it ranks 612 of 906.
Learn more
Two guides worth reading on 07932: zone vs. frost date, on why Zone 7a and Florham Park's frost date answer different questions, and the frost range, on how to read the range around Florham Park's dates instead of trusting one.