Mount Vernon, NY 10704 Frost Dates
10704, near Mount Vernon, NY: the frost window
Typically, the last spring freeze lands around 04/01, roughly 216 days out. Fall's first freeze usually shows up around 11/16, roughly 230 days after the last spring frost.
Mount Vernon sits in USDA Zone 7b (5 to 10°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 Vernon's growing season runs out in roughly 11 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 Vernon's last frost
04/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/19 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/12 and only about 1 year in 10 sees frost after that.
Mount Vernon against the rest of the dataset
About 230 days separate Mount Vernon's last and first frost, putting it 10,304 of 40,283 ZIP codes nationally. Within NY, it ranks 57 of 1,951.
Learn more
Two guides worth reading on 10704: the frost range, on how to read the range around Mount Vernon's dates instead of trusting one, and local microclimates, on what one yard in Mount Vernon can differ from the 10704 normal.