Alexandria Bay, NY 13640 Frost Dates
Alexandria Bay, NY: when does the frost end?
Typically, the last spring freeze lands around 05/14, roughly 259 days out. Fall's first freeze usually shows up around 09/26, roughly 134 days after the last spring frost.
Zone 5b (-15 to -10°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 Alexandria Bay, not a forecast for this year.
Stretching the season past the first frost
With roughly 4 weeks until Alexandria Bay'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
05/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/30 and only about 1 year in 10 sees frost after that.
Alexandria Bay against the rest of the dataset
Alexandria Bay's growing season runs about 134 days, ranking 37,989 of 40,283 US ZIP codes measured here, longest to shortest. Within NY, it ranks 1,867 of 1,951.
Learn more
Before leaning on 13640's figures: local microclimates explains what one yard in Alexandria Bay can differ from the 13640 normal, while zone vs. frost date explains why Zone 5b and Alexandria Bay's frost date answer different questions.