Mountain Lakes, NJ 07046 Frost Dates
07046, near Mountain Lakes, NJ: the frost window
The last spring frost here typically falls around 04/17, about 232 days from today. Fall's first freeze usually shows up around 10/23, roughly 189 days after the last spring frost.
Mountain Lakes sits in USDA Zone 6b (-5 to 0°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.
Stretching the season past the first frost
Mountain Lakes's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/17 isn't a guarantee
04/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/04 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/05 and only about 1 year in 10 sees frost after that.
Mountain Lakes against the rest of the dataset
Mountain Lakes's growing season runs about 189 days, ranking 21,554 of 40,283 US ZIP codes measured here, longest to shortest. Within NJ, it ranks 651 of 906.
Learn more
Two guides worth reading on 07046: the frost range, on how to read the range around Mountain Lakes's dates instead of trusting one, and local microclimates, on what one yard in Mountain Lakes can differ from the 07046 normal.