Fort Ann, NY 12821 Frost Dates
Frost dates for Fort Ann, NY, ZIP 12821
Around 04/30 is the usual last spring frost, about 245 days away. The first fall frost typically arrives around 10/12, about 164 frost-free days later.
Zone 5a (-20 to -15°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 Fort Ann, not a forecast for this year.
What to do before the first frost
Zone 5a around Fort Ann has about 6 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 04/30 isn't a guarantee
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/18 and you're betting against frost in roughly 9 years out of 10. 05/14 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Fort Ann compares
At roughly 164 frost-free days, Fort Ann places 31,136 of 40,283 ZIP codes in this dataset. Within NY, it ranks 929 of 1,951.
Learn more
the frost range explains how to read the range around Fort Ann's dates instead of trusting one, and local microclimates explains what one yard in Fort Ann can differ from the 12821 normal.