Andover, NJ 07821 Frost Dates
07821, near Andover, NJ: the frost window
The last spring frost here typically falls around 04/25, about 240 days from today. Fall's first freeze usually shows up around 10/19, roughly 175 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Andover in Zone 6b (-5 to 0°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
Andover's growing season runs out in roughly 7 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 Andover's last frost
04/25 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/11 and only about 1 year in 10 sees frost after that.
Andover against the rest of the dataset
At roughly 175 frost-free days, Andover places 27,149 of 40,283 ZIP codes in this dataset. Within NJ, it ranks 826 of 906.
Learn more
Two guides worth reading on 07821: the frost range, on how to read the range around Andover's dates instead of trusting one, and local microclimates, on what one yard in Andover can differ from the 07821 normal.