Mount Kisco, NY 10576 Frost Dates
10576, near Mount Kisco, NY: the frost window
Typically, the last spring freeze lands around 04/17, roughly 232 days out. Fall's first freeze usually shows up around 10/23, roughly 188 days after the last spring frost.
Mount Kisco 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
Mount Kisco'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.
The actual range around Mount Kisco's last frost
04/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/03 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/02 and only about 1 year in 10 sees frost after that.
Mount Kisco against the rest of the dataset
About 188 days separate Mount Kisco's last and first frost, putting it 21,922 of 40,283 ZIP codes nationally. Within NY, it ranks 412 of 1,951.
Learn more
Two guides worth reading on 10576: zone vs. frost date, on why Zone 6b and Mount Kisco's frost date answer different questions, and the frost range, on how to read the range around Mount Kisco's dates instead of trusting one.