New Brunswick, NJ 08901 Frost Dates
08901, near New Brunswick, NJ: the frost window
The last spring frost here typically falls around 04/30, about 245 days from today. Fall's first freeze usually shows up around 10/20, roughly 172 days after the last spring frost.
Zone 7a (0 to 5°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 New Brunswick, not a forecast for this year.
Stretching the season past the first frost
New Brunswick's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/30 isn't a guarantee
04/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/15 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/14 and only about 1 year in 10 sees frost after that.
New Brunswick against the rest of the dataset
About 172 days separate New Brunswick's last and first frost, putting it 28,153 of 40,283 ZIP codes nationally. Within NJ, it ranks 861 of 906.
Learn more
Two guides worth reading on 08901: zone vs. frost date, on why Zone 7a and New Brunswick's frost date answer different questions, and the frost range, on how to read the range around New Brunswick's dates instead of trusting one.