Frost Dates for 11575 — Roosevelt, New York

Half of springs at Oceanside, NY see their last 32°F night by April 7; only one in ten is past it by March 24, and one in ten still has one after April 26. Planting tender crops after April 15 leaves a 30% risk of a frost on them, after April 19 20%, and after April 26 10%. The 19 days between the even-odds date and the one-in-ten date is wider than at 98% of the 173 New York stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 8 in half of years, as early as October 27 one year in ten, and holds off past November 23 one year in ten. A hard freeze of 28°F follows 13 days later, around November 21; in spring the one-in-ten date for 28°F is April 9, 17 days before the 32°F one. The freeze-free season lasts 212 days in a typical year, longer than at 91% of the 173 New York stations; it reaches 233 days one year in ten and falls short of 192 one year in ten. On average 89 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 15 days longer, to about April 22, and return around October 29. Severe cold of 16°F or below comes in 97% of winters, usually between January 4 and February 18.

July is the warmest month at Oceanside, NY, averaging 82°F by day and 67°F at night; January is the coldest at 39°F and 26°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 74% of years.

Warmth for growing adds up to 3,227 growing degree days a year (base 50°F), more than at 90% of the 173 New York stations. 29% of them (940) have built up by the end of June, and July adds the most, 758. Precipitation totals 48.8 inches a year, most in March (4.6") and least in February (3.0"); May to September bring 43% of it.

The nearest other station, Mineola, NY, 4 miles northwest of Roosevelt, has a last frost 5 days earlier (April 2), a first frost 4 days later (November 12), a season 12 days longer.

The first measurable snow (0.1 inch or more) in Roosevelt usually arrives around December 20, and the last of the season around March 23. Those are the middle dates across the winters of 1991–2020 at Oceanside, NY, 3.8 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 15 days after the last snow.

ZIP 11575 is 4 miles from Oceanside, NY, which stands at 12 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 10 other ZIP codes share the station; its figures are presented in full for 11520 (Freeport). The 2023 USDA Plant Hardiness Zone Map lists ZIP 11575 in zone 7b, the band where the coldest night of the year averaged 5 to 10°F (-15.0 to -12.2°C) over 1991–2020; a zone describes winter lows, not frost dates.