Mamaroneck, NY 10528 Frost Dates
10528, near Mamaroneck, NY: the frost window
Typically, the last spring freeze lands around 04/20, roughly 235 days out. Fall's first freeze usually shows up around 10/26, roughly 189 days after the last spring frost.
Zone 7b (5 to 10°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 Mamaroneck, not a forecast for this year.
Stretching the season past the first frost
Mamaroneck'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.
How much risk comes with planting early here
04/20 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 05/06 and only about 1 year in 10 sees frost after that.
Mamaroneck against the rest of the dataset
About 189 days separate Mamaroneck's last and first frost, putting it 21,428 of 40,283 ZIP codes nationally. Within NY, it ranks 384 of 1,951.
Learn more
Two guides worth reading on 10528: the frost range, on how to read the range around Mamaroneck's dates instead of trusting one, and local microclimates, on what one yard in Mamaroneck can differ from the 10528 normal.