Mount Vernon, NY 10553 Frost Dates
Mount Vernon, NY: when does the frost end?
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
With roughly 11 weeks until Mount Vernon's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/01 isn't a guarantee
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 10,303 of 40,283 ZIP codes nationally. Within NY, it ranks 56 of 1,951.
Learn more
Before leaning on 10553's figures: the frost range explains how to read the range around Mount Vernon's dates instead of trusting one, while local microclimates explains what one yard in Mount Vernon can differ from the 10553 normal.