Perth Amboy, NJ 10307 Frost Dates
10307, near Perth Amboy, NJ: the frost window
Typically, the last spring freeze lands around 04/11, roughly 226 days out. Fall's first freeze usually shows up around 10/31, roughly 202 days after the last spring frost.
Perth Amboy sits in USDA Zone 7b (5 to 10°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
Perth Amboy'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 04/11 isn't a guarantee
04/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/28 and only about 1 year in 10 sees frost after that.
Perth Amboy against the rest of the dataset
At roughly 202 frost-free days, Perth Amboy places 17,116 of 40,283 ZIP codes in this dataset. Within NJ, it ranks 380 of 906.
Learn more
Two guides worth reading on 10307: the frost range, on how to read the range around Perth Amboy's dates instead of trusting one, and local microclimates, on what one yard in Perth Amboy can differ from the 10307 normal.