Frost Dates for 11941 — Eastport, New York

Half of springs at Westhamptn Gabreski Airport, NY see their last 32°F night by May 7; only one in ten is past it by April 23, and one in ten still has one after May 23. Planting tender crops after May 14 leaves a 30% risk of a frost on them, after May 17 20%, and after May 23 10%. The 16 days between the even-odds date and the one-in-ten date is wider than at 71% of the 173 New York stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 14 in half of years, as early as October 2 one year in ten, and holds off past October 31 one year in ten. A hard freeze of 28°F follows 12 days later, around October 26; in spring the one-in-ten date for 28°F is May 12, 11 days before the 32°F one. The freeze-free season lasts 160 days in a typical year, shorter than at 53% of the 173 New York stations; it reaches 181 days one year in ten and falls short of 139 one year in ten. On average 132 nights a year drop to 32°F or below. Nights of 36°F, when frost can still settle on leaves in low, open spots, continue 13 days longer, to about May 20, and return around October 4. Severe cold of 16°F or below comes every winter, usually between December 1 and March 16.

July is the warmest month at Westhamptn Gabreski Airport, NY, averaging 81°F by day and 63°F at night; January is the coldest at 39°F and 20°F. A freezing night is all but certain in every month from November to April (a 90% chance or more). From June to September the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 71% of years.

Warmth for growing adds up to 2,648 growing degree days a year (base 50°F), more than at 62% of the 173 New York stations. 27% of them (719) have built up by the end of June, and July adds the most, 679. Precipitation totals 43.6 inches a year, most in October (4.7") and least in February (2.7"); May to September bring 39% of it.

The nearest other station, Shirley Brookhaven Airport, NY, 8 miles west of Eastport, has a last frost 19 days earlier (April 18), a first frost 14 days later (October 28), a season 33 days longer.

The first measurable snow (0.1 inch or more) in Eastport usually arrives around December 12, and the last of the season around March 19. Those are the middle dates across the winters of 1991–2020 at Upton Coop - Nwsfo New York, NY, 7.9 miles away: half of years saw snow earlier, half later. Every one of those winters saw snow. The last 32°F night of spring typically comes 49 days after the last snow.

ZIP 11941 is 5 miles from Westhamptn Gabreski Airport, NY, which stands at 67 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 4 other ZIP codes share the station; its figures are presented in full for 11946 (Hampton Bays). The 2023 USDA Plant Hardiness Zone Map lists ZIP 11941 in zone 7a, the band where the coldest night of the year averaged 0 to 5°F (-17.8 to -15.0°C) over 1991–2020; a zone describes winter lows, not frost dates.