Frost Dates for 14782 — Sinclairville, New York

Half of springs at Jamestown 4 ENE, NY see their last 32°F night by May 8; only one in ten is past it by April 22, and one in ten still has one after May 25. Planting tender crops after May 15 leaves a 30% risk of a frost on them, after May 20 20%, and after May 25 10%. The 17 days between the even-odds date and the one-in-ten date is wider than at 90% of the 173 New York stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 13 in half of years, as early as October 1 one year in ten, and holds off past October 30 one year in ten. A hard freeze of 28°F follows 15 days later, around October 28; in spring the one-in-ten date for 28°F is May 13, 12 days before the 32°F one. The freeze-free season lasts 158 days in a typical year, shorter than at 56% of the 173 New York stations; it reaches 179 days one year in ten and falls short of 136 one year in ten. On average 152 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 12 days longer, to about May 20, and return around October 1. Severe cold of 16°F or below comes every winter, usually between December 3 and March 20.

July is the warmest month at Jamestown 4 ENE, NY, averaging 80°F by day and 57°F at night; January is the coldest at 32°F and 16°F. A freezing night is all but certain in every month from October 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 68% of years.

Warmth for growing adds up to 2,365 growing degree days a year (base 50°F), fewer than at 58% of the 173 New York stations. 32% of them (766) have built up by the end of June, and July adds the most, 584. Precipitation totals 46.0 inches a year, most in July (4.6") and least in February (2.7"); May to September bring 45% of it.

The nearest other station, Fredonia, NY, 13 miles north of Sinclairville and 490 feet lower, has a last frost 13 days earlier (April 25), a first frost 19 days later (November 1), a season 27 days longer.

The first measurable snow (0.1 inch or more) in Sinclairville usually arrives around November 10, and the last of the season around April 6. Those are the middle dates across the winters of 1991–2020 at Jamestown 4 ENE, NY, 11.9 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 32 days after the last snow.

ZIP 14782 is 12 miles from Jamestown 4 ENE, NY, which stands at 1,250 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 7 other ZIP codes share the station; its figures are presented in full for 14701 (Jamestown). The 2023 USDA Plant Hardiness Zone Map lists ZIP 14782 in zone 6a, the band where the coldest night of the year averaged -10 to -5°F (-23.3 to -20.6°C) over 1991–2020; a zone describes winter lows, not frost dates.