Glassboro, NJ 08025 Frost Dates
08025, near Glassboro, NJ: the frost window
Typically, the last spring freeze lands around 04/08, roughly 223 days out. Fall's first freeze usually shows up around 11/01, roughly 205 days after the last spring frost.
Glassboro 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
Glassboro'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.
How much risk comes with planting early here
04/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/22 and only about 1 year in 10 sees frost after that.
Glassboro against the rest of the dataset
At roughly 205 frost-free days, Glassboro places 16,184 of 40,283 ZIP codes in this dataset. Within NJ, it ranks 358 of 906.
Learn more
Two guides worth reading on 08025: zone vs. frost date, on why Zone 7b and Glassboro's frost date answer different questions, and the frost range, on how to read the range around Glassboro's dates instead of trusting one.