Pennington, NJ 08560 Frost Dates
08560, near Pennington, NJ: the frost window
The last spring frost here typically falls around 04/10, about 225 days from today. Fall's first freeze usually shows up around 11/01, roughly 202 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Pennington in Zone 7a (0 to 5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Pennington'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.
The actual range around Pennington's last frost
04/10 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 04/25 and only about 1 year in 10 sees frost after that.
Pennington against the rest of the dataset
At roughly 202 frost-free days, Pennington places 17,241 of 40,283 ZIP codes in this dataset. Within NJ, it ranks 418 of 906.
Learn more
Two guides worth reading on 08560: the frost range, on how to read the range around Pennington's dates instead of trusting one, and local microclimates, on what one yard in Pennington can differ from the 08560 normal.