Fieldsboro, NJ 08505 Frost Dates
08505, near Fieldsboro, NJ: the frost window
Around 04/15 is the usual last spring frost, about 230 days away. Fall's first freeze usually shows up around 10/29, roughly 196 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Fieldsboro 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
Fieldsboro'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 Fieldsboro's last frost
04/15 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/01 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/29 and only about 1 year in 10 sees frost after that.
Fieldsboro against the rest of the dataset
At roughly 196 frost-free days, Fieldsboro places 19,067 of 40,283 ZIP codes in this dataset. Within NJ, it ranks 478 of 906.
Learn more
Two guides worth reading on 08505: local microclimates, on what one yard in Fieldsboro can differ from the 08505 normal, and zone vs. frost date, on why Zone 7a and Fieldsboro's frost date answer different questions.