Penns Grove, NJ 08023 Frost Dates
08023, near Penns Grove, NJ: the frost window
The last spring frost here typically falls around 04/07, about 222 days from today. Fall's first freeze usually shows up around 11/01, roughly 209 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Penns Grove in Zone 7b (5 to 10°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
Penns Grove'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 Penns Grove's last frost
04/07 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/26 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/21 and only about 1 year in 10 sees frost after that.
Penns Grove against the rest of the dataset
At roughly 209 frost-free days, Penns Grove places 15,218 of 40,283 ZIP codes in this dataset. Within NJ, it ranks 309 of 906.
Learn more
Two guides worth reading on 08023: zone vs. frost date, on why Zone 7b and Penns Grove's frost date answer different questions, and the frost range, on how to read the range around Penns Grove's dates instead of trusting one.