Lake Grove, NY 11720 Frost Dates
11720, near Lake Grove, NY: the frost window
Typically, the last spring freeze lands around 04/10, roughly 225 days out. Fall's first freeze usually shows up around 11/02, roughly 207 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Lake Grove in Zone 7b (5 to 10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Lake Grove's growing season runs out in roughly 9 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/10 isn't a guarantee
04/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/31 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/25 and only about 1 year in 10 sees frost after that.
Lake Grove against the rest of the dataset
About 207 days separate Lake Grove's last and first frost, putting it 15,801 of 40,283 ZIP codes nationally. Within NY, it ranks 280 of 1,951.
Learn more
Two guides worth reading on 11720: local microclimates, on what one yard in Lake Grove can differ from the 11720 normal, and zone vs. frost date, on why Zone 7b and Lake Grove's frost date answer different questions.