Cortland, NY 13045 Frost Dates
Cortland, NY: when does the frost end?
Around 05/07 is the usual last spring frost, about 252 days away. Fall's first freeze usually shows up around 10/08, roughly 154 days after the last spring frost.
Cortland sits in USDA Zone 5b (-15 to -10°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 6 weeks until Cortland's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Cortland's last frost
05/07 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 05/23 and only about 1 year in 10 sees frost after that.
Cortland against the rest of the dataset
At roughly 154 frost-free days, Cortland places 34,230 of 40,283 ZIP codes in this dataset. Within NY, it ranks 1,400 of 1,951.
Learn more
Before leaning on 13045's figures: local microclimates explains what one yard in Cortland can differ from the 13045 normal, while zone vs. frost date explains why Zone 5b and Cortland's frost date answer different questions.