Mount Arlington, NJ 07850 Frost Dates
When can you plant in Mount Arlington, NJ?
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.
Zone 6b (-5 to 0°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Mount Arlington, not a forecast for this year.
What to do before the first frost
About 7 weeks of growing season left in Mount Arlington before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Mount Arlington's last frost
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
Mount Arlington's growing season runs about 175 days, ranking 26,870 of 40,283 US ZIP codes measured here, longest to shortest. Within NJ, it ranks 817 of 906.
Learn more
zone vs. frost date covers why Zone 6b and Mount Arlington's frost date answer different questions. the frost range covers how to read the range around Mount Arlington's dates instead of trusting one.