Unadilla, NY 13839 Frost Dates
Unadilla, NY: when does the frost end?
Around 05/11 is the usual last spring frost, about 256 days away. Fall's first freeze usually shows up around 10/09, roughly 151 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 Unadilla, not a forecast for this year.
Stretching the season past the first frost
With roughly 6 weeks until Unadilla's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/11 isn't a guarantee
05/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/26 and only about 1 year in 10 sees frost after that.
Unadilla against the rest of the dataset
Unadilla's growing season runs about 151 days, ranking 35,090 of 40,283 US ZIP codes measured here, longest to shortest. Within NY, it ranks 1,542 of 1,951.
Learn more
Before leaning on 13839's figures: the frost range explains how to read the range around Unadilla's dates instead of trusting one, while local microclimates explains what one yard in Unadilla can differ from the 13839 normal.