Ardsley, NY 10502 Frost Dates
10502, near Ardsley, 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.
Ardsley 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.
Stretching the season past the first frost
Ardsley'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.
Ardsley against the rest of the dataset
At roughly 189 frost-free days, Ardsley places 21,548 of 40,283 ZIP codes in this dataset. Within NY, it ranks 404 of 1,951.
Learn more
Two guides worth reading on 10502: zone vs. frost date, on why Zone 7a and Ardsley's frost date answer different questions, and the frost range, on how to read the range around Ardsley's dates instead of trusting one.