Penns Grove, NJ 08069 Frost Dates
Penns Grove, NJ: when does the frost end?
Around 04/07 is the usual last spring frost, about 222 days away. Fall's first freeze usually shows up around 11/04, roughly 209 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 Penns Grove, not a forecast for this year.
Stretching the season past the first frost
With roughly 10 weeks until Penns Grove's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
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 04/24 and only about 1 year in 10 sees frost after that.
Penns Grove against the rest of the dataset
Penns Grove's growing season runs about 209 days, ranking 15,220 of 40,283 US ZIP codes measured here, longest to shortest. Within NJ, it ranks 311 of 906.
Learn more
Before leaning on 08069's figures: zone vs. frost date explains why Zone 7b and Penns Grove's frost date answer different questions, while the frost range explains how to read the range around Penns Grove's dates instead of trusting one.