Plattsburgh, NY 05458 Frost Dates
05458, near Plattsburgh, NY: the frost window
Around 04/28 is the usual last spring frost, about 243 days away. Fall's first freeze usually shows up around 10/20, roughly 174 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 Plattsburgh, not a forecast for this year.
Stretching the season past the first frost
Plattsburgh's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
04/28 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/19 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/10 and only about 1 year in 10 sees frost after that.
Plattsburgh against the rest of the dataset
About 174 days separate Plattsburgh's last and first frost, putting it 27,367 of 40,283 ZIP codes nationally. Within NY, it ranks 616 of 1,951.
Learn more
Two guides worth reading on 05458: the frost range, on how to read the range around Plattsburgh's dates instead of trusting one, and local microclimates, on what one yard in Plattsburgh can differ from the 05458 normal.