Caldwell, NJ 07006 Frost Dates
Caldwell, NJ: when does the frost end?
Around 04/18 is the usual last spring frost, about 233 days away. Fall's first freeze usually shows up around 10/24, roughly 187 days after the last spring frost.
Caldwell sits in USDA Zone 7a (0 to 5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 8 weeks until Caldwell's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/18 isn't a guarantee
04/18 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/03 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/07 and only about 1 year in 10 sees frost after that.
Caldwell against the rest of the dataset
At roughly 187 frost-free days, Caldwell places 22,316 of 40,283 ZIP codes in this dataset. Within NJ, it ranks 693 of 906.
Learn more
Before leaning on 07006's figures: local microclimates explains what one yard in Caldwell can differ from the 07006 normal, while zone vs. frost date explains why Zone 7a and Caldwell's frost date answer different questions.