Dannemora, NY 12952 Frost Dates
12952, near Dannemora, NY: the frost window
The last spring frost here typically falls around 05/06, about 251 days from today. Fall's first freeze usually shows up around 10/11, roughly 157 days after the last spring frost.
Dannemora sits in USDA Zone 4b (-25 to -20°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
Dannemora's growing season runs out in roughly 6 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 05/06 isn't a guarantee
05/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/21 and only about 1 year in 10 sees frost after that.
Dannemora against the rest of the dataset
About 157 days separate Dannemora's last and first frost, putting it 33,332 of 40,283 ZIP codes nationally. Within NY, it ranks 1,226 of 1,951.
Learn more
Two guides worth reading on 12952: local microclimates, on what one yard in Dannemora can differ from the 12952 normal, and zone vs. frost date, on why Zone 4b and Dannemora's frost date answer different questions.