Watchung, NJ 07946 Frost Dates
Watchung, NJ: when does the frost end?
Around 04/30 is the usual last spring frost, about 245 days away. Fall's first freeze usually shows up around 10/20, roughly 172 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Watchung 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 Watchung'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
04/30 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.
Watchung against the rest of the dataset
At roughly 172 frost-free days, Watchung places 28,260 of 40,283 ZIP codes in this dataset. Within NJ, it ranks 873 of 906.
Learn more
Before leaning on 07946's figures: the frost range explains how to read the range around Watchung's dates instead of trusting one, while local microclimates explains what one yard in Watchung can differ from the 07946 normal.