Old Tappan, NJ 10962 Frost Dates
Frost dates for Old Tappan, NJ, ZIP 10962
The last spring frost here typically falls around 04/20, about 235 days from today. The first fall frost typically arrives around 10/26, about 189 frost-free days later.
Old Tappan 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
Zone 7a around Old Tappan has about 8 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 04/20 isn't a guarantee
04/20 is the middle of 30 years of NOAA records, not a promise. Plant by 04/04 and you're betting against frost in roughly 9 years out of 10. 05/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Old Tappan compares
About 189 days separate Old Tappan's last and first frost, putting it 21,528 of 40,283 ZIP codes nationally. Within NJ, it ranks 641 of 906.
Learn more
local microclimates explains what one yard in Old Tappan can differ from the 10962 normal, and zone vs. frost date explains why Zone 7a and Old Tappan's frost date answer different questions.