Hackettstown, NJ 07838 Frost Dates
07838, near Hackettstown, NJ: the frost window
Typically, the last spring freeze lands around 04/25, roughly 240 days out. Fall's first freeze usually shows up around 10/19, roughly 175 days after the last spring frost.
Hackettstown sits in USDA Zone 6b (-5 to 0°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
Hackettstown'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.
The actual range around Hackettstown's last frost
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 05/11 and only about 1 year in 10 sees frost after that.
Hackettstown against the rest of the dataset
At roughly 175 frost-free days, Hackettstown places 26,808 of 40,283 ZIP codes in this dataset. Within NJ, it ranks 812 of 906.
Learn more
Two guides worth reading on 07838: zone vs. frost date, on why Zone 6b and Hackettstown's frost date answer different questions, and the frost range, on how to read the range around Hackettstown's dates instead of trusting one.