Milltown, NJ 08906 Frost Dates
08906, near Milltown, NJ: the frost window
Typically, the last spring freeze lands around 04/17, roughly 232 days out. Fall's first freeze usually shows up around 10/23, roughly 190 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Milltown 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
Milltown'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.
How much risk comes with planting early here
04/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/06 and only about 1 year in 10 sees frost after that.
Milltown against the rest of the dataset
At roughly 190 frost-free days, Milltown places 21,128 of 40,283 ZIP codes in this dataset. Within NJ, it ranks 580 of 906.
Learn more
Two guides worth reading on 08906: the frost range, on how to read the range around Milltown's dates instead of trusting one, and local microclimates, on what one yard in Milltown can differ from the 08906 normal.