Cornwall-on-Hudson, NY 12518 Frost Dates
When can you plant in Cornwall-on-Hudson, NY?
The last spring frost here typically falls around 04/10, about 225 days from today. The first fall frost typically arrives around 11/01, about 204 frost-free days later.
Zone 6b (-5 to 0°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Cornwall-on-Hudson, not a forecast for this year.
What to do before the first frost
About 9 weeks of growing season left in Cornwall-on-Hudson before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/10 isn't a guarantee
04/10 is the middle of 30 years of NOAA records, not a promise. Plant by 03/31 and you're betting against frost in roughly 9 years out of 10. 04/24 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Cornwall-on-Hudson compares
Cornwall-on-Hudson's growing season runs about 204 days, ranking 16,606 of 40,283 US ZIP codes measured here, longest to shortest. Within NY, it ranks 306 of 1,951.
Learn more
local microclimates covers what one yard in Cornwall-on-Hudson can differ from the 12518 normal. zone vs. frost date covers why Zone 6b and Cornwall-on-Hudson's frost date answer different questions.