Mountainside, NJ 07092 Frost Dates
Frost dates for Mountainside, NJ, ZIP 07092
Typically, the last spring freeze lands around 04/11, roughly 226 days out. The first fall frost typically arrives around 10/31, about 202 frost-free days later.
Mountainside 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 Mountainside has about 9 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 04/11 isn't a guarantee
04/11 is the middle of 30 years of NOAA records, not a promise. Plant by 03/30 and you're betting against frost in roughly 9 years out of 10. 04/28 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mountainside compares
At roughly 202 frost-free days, Mountainside places 17,221 of 40,283 ZIP codes in this dataset. Within NJ, it ranks 414 of 906.
Learn more
zone vs. frost date explains why Zone 7a and Mountainside's frost date answer different questions, and the frost range explains how to read the range around Mountainside's dates instead of trusting one.