Mount Vernon, NY 10466 Frost Dates
When can you plant in Mount Vernon, NY?
Typically, the last spring freeze lands around 04/01, roughly 216 days out. The first fall frost typically arrives around 11/16, about 230 frost-free days later.
The USDA Plant Hardiness Zone Map puts Mount Vernon in Zone 7b (5 to 10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 11 weeks of growing season left in Mount Vernon before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/01 is the middle of 30 years of NOAA records, not a promise. Plant by 03/19 and you're betting against frost in roughly 9 years out of 10. 04/12 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mount Vernon compares
About 230 days separate Mount Vernon's last and first frost, putting it 10,299 of 40,283 ZIP codes nationally. Within NY, it ranks 52 of 1,951.
Learn more
zone vs. frost date covers why Zone 7b and Mount Vernon's frost date answer different questions. the frost range covers how to read the range around Mount Vernon's dates instead of trusting one.