Dannemora, NY 12918 Frost Dates
Dannemora, NY: when does the frost end?
Typically, the last spring freeze lands around 05/06, roughly 251 days out. Fall's first freeze usually shows up around 10/11, roughly 157 days after the last spring frost.
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 Dannemora, not a forecast for this year.
Stretching the season past the first frost
With roughly 6 weeks until Dannemora's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
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
Dannemora's growing season runs about 157 days, ranking 33,329 of 40,283 US ZIP codes measured here, longest to shortest. Within NY, it ranks 1,223 of 1,951.
Learn more
Before leaning on 12918's figures: zone vs. frost date explains why Zone 5a and Dannemora's frost date answer different questions, while the frost range explains how to read the range around Dannemora's dates instead of trusting one.