North Caldwell, NJ 07009 Frost Dates
When can you plant in North Caldwell, NJ?
Typically, the last spring freeze lands around 04/15, roughly 230 days out. The first fall frost typically arrives around 10/28, about 195 frost-free days later.
North 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.
What to do before the first frost
About 9 weeks of growing season left in North Caldwell before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around North Caldwell's last frost
04/15 is the middle of 30 years of NOAA records, not a promise. Plant by 04/01 and you're betting against frost in roughly 9 years out of 10. 05/01 is the safer bet, historically only a 1-in-10 chance of frost that late.
How North Caldwell compares
About 195 days separate North Caldwell's last and first frost, putting it 19,243 of 40,283 ZIP codes nationally. Within NJ, it ranks 516 of 906.
Learn more
zone vs. frost date covers why Zone 7a and North Caldwell's frost date answer different questions. the frost range covers how to read the range around North Caldwell's dates instead of trusting one.