Perth Amboy, NJ 08861 Frost Dates
Perth Amboy, NJ: when does the frost end?
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
With roughly 9 weeks until Perth Amboy's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Perth Amboy's last frost
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 17,114 of 40,283 ZIP codes in this dataset. Within NJ, it ranks 378 of 906.
Learn more
Before leaning on 08861's figures: zone vs. frost date explains why Zone 7b and Perth Amboy's frost date answer different questions, while the frost range explains how to read the range around Perth Amboy's dates instead of trusting one.