Hillsdale, NJ 07642 Frost Dates
Hillsdale, NJ: when does the frost end?
Typically, the last spring freeze lands around 04/20, roughly 235 days out. Fall's first freeze usually shows up around 10/26, roughly 189 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Hillsdale 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
With roughly 8 weeks until Hillsdale's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/04 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.
Hillsdale against the rest of the dataset
Hillsdale's growing season runs about 189 days, ranking 21,470 of 40,283 US ZIP codes measured here, longest to shortest. Within NJ, it ranks 616 of 906.
Learn more
Before leaning on 07642's figures: the frost range explains how to read the range around Hillsdale's dates instead of trusting one, while local microclimates explains what one yard in Hillsdale can differ from the 07642 normal.