Black River, NY 13602 Frost Dates
Black River, NY: when does the frost end?
The last spring frost here typically falls around 05/02, about 247 days from today. Fall's first freeze usually shows up around 10/13, roughly 163 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Black River in Zone 5a (-20 to -15°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 7 weeks until Black River's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Black River's last frost
05/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/20 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/17 and only about 1 year in 10 sees frost after that.
Black River against the rest of the dataset
Black River's growing season runs about 163 days, ranking 31,439 of 40,283 US ZIP codes measured here, longest to shortest. Within NY, it ranks 964 of 1,951.
Learn more
Before leaning on 13602's figures: zone vs. frost date explains why Zone 5a and Black River's frost date answer different questions, while the frost range explains how to read the range around Black River's dates instead of trusting one.