Mount Arlington, NJ 07856 Frost Dates
Frost dates for Mount Arlington, NJ, ZIP 07856
Typically, the last spring freeze lands around 04/25, roughly 240 days out. The first fall frost typically arrives around 10/19, about 175 frost-free days later.
The USDA Plant Hardiness Zone Map puts Mount Arlington in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 6b around Mount Arlington has about 7 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.
How much risk comes with planting early here
04/25 is the middle of 30 years of NOAA records, not a promise. Plant by 04/12 and you're betting against frost in roughly 9 years out of 10. 05/11 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mount Arlington compares
At roughly 175 frost-free days, Mount Arlington places 26,871 of 40,283 ZIP codes in this dataset. Within NJ, it ranks 818 of 906.
Learn more
local microclimates explains what one yard in Mount Arlington can differ from the 07856 normal, and zone vs. frost date explains why Zone 6b and Mount Arlington's frost date answer different questions.