Guttenberg, NJ 10164 Frost Dates
Guttenberg, NJ: when does the frost end?
Typically, the last spring freeze lands around 03/30, roughly 214 days out. Fall's first freeze usually shows up around 11/20, roughly 236 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 Guttenberg, not a forecast for this year.
Stretching the season past the first frost
With roughly 12 weeks until Guttenberg's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 03/30 isn't a guarantee
03/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/09 and only about 1 year in 10 sees frost after that.
Guttenberg against the rest of the dataset
At roughly 236 frost-free days, Guttenberg places 9,385 of 40,283 ZIP codes in this dataset. Within NJ, it ranks 150 of 906.
Learn more
Before leaning on 10164's figures: local microclimates explains what one yard in Guttenberg can differ from the 10164 normal, while zone vs. frost date explains why Zone 7b and Guttenberg's frost date answer different questions.