Frost Dates for 12117 — Mayfield, New York

Half of springs at Gloversville 7NW (Peck Lake), NY see their last 32°F night by May 11; only one in ten is past it by April 30, and one in ten still has one after May 25. Planting tender crops after May 17 leaves a 30% risk of a frost on them, after May 21 20%, and after May 25 10%. The 14 days between the even-odds date and the one-in-ten date is narrower than at 63% of the 173 New York stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 3 in half of years, as early as September 20 one year in ten, and holds off past October 15 one year in ten. A hard freeze of 28°F follows 11 days later, around October 14; 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 143 days in a typical year, shorter than at 87% of the 173 New York stations; it reaches 160 days one year in ten and falls short of 125 one year in ten. On average 179 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 23, and return around September 23. Severe cold of 16°F or below comes every winter, usually between November 17 and April 2.

July is the warmest month at Gloversville 7NW (Peck Lake), NY, averaging 77°F by day and 56°F at night; January is the coldest at 25°F and 7°F. A freezing night is all but certain in every month from October to April (a 90% chance or more). From June to August the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 87% of years.

Warmth for growing adds up to 1,692 growing degree days a year (base 50°F), fewer than at 99% of the 173 New York stations. 30% of them (515) have built up by the end of June, and July adds the most, 503.

The nearest other station, Conklingville Dam, NY, 20 miles northeast of Mayfield and 647 feet lower, has a last frost 11 days earlier (April 30), a first frost 13 days later (October 16), a season 26 days longer.

The first measurable snow (0.1 inch or more) in Mayfield usually arrives around November 30, and the last of the season around March 30. Those are the middle dates across the winters of 1991–2020 at Northville, NY, 1.8 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 42 days after the last snow.

ZIP 12117 is 10 miles from Gloversville 7NW (Peck Lake), NY, which stands at 1,455 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 5 other ZIP codes share the station; its figures are presented in full for 12078 (Gloversville). The 2023 USDA Plant Hardiness Zone Map lists ZIP 12117 in zone 5a, the band where the coldest night of the year averaged -20 to -15°F (-28.9 to -26.1°C) over 1991–2020; a zone describes winter lows, not frost dates.