Northport, NY 11731 Frost Dates
Frost dates for Northport, NY, ZIP 11731
Around 04/09 is the usual last spring frost, about 224 days away. The first fall frost typically arrives around 11/10, about 215 frost-free days later.
The USDA Plant Hardiness Zone Map puts Northport in Zone 7b (5 to 10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 7b around Northport has about 11 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
04/09 is the middle of 30 years of NOAA records, not a promise. Plant by 03/30 and you're betting against frost in roughly 9 years out of 10. 04/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Northport compares
Northport's growing season runs about 215 days, ranking 14,071 of 40,283 US ZIP codes measured here, longest to shortest. Within NY, it ranks 220 of 1,951.
Learn more
local microclimates explains what one yard in Northport can differ from the 11731 normal, and zone vs. frost date explains why Zone 7b and Northport's frost date answer different questions.