Frost Dates for 14895 — Wellsville, New York

Half of springs at Wellsville, NY see their last 32°F night by May 15; only one in ten is past it by April 30, and one in ten still has one after May 31. Planting tender crops after May 23 leaves a 30% risk of a frost on them, after May 27 20%, and after May 31 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 2 in half of years, as early as September 18 one year in ten, and holds off past October 17 one year in ten. A hard freeze of 28°F follows 13 days later, around October 15; in spring the one-in-ten date for 28°F is May 22, 9 days before the 32°F one. The freeze-free season lasts 140 days in a typical year, shorter than at 90% of the 173 New York stations; it reaches 160 days one year in ten and falls short of 118 one year in ten. On average 169 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 14 days longer, to about May 29, and return around September 23. Severe cold of 16°F or below comes every winter, usually between November 24 and March 31.

July is the warmest month at Wellsville, NY, averaging 79°F by day and 54°F at night; January is the coldest at 31°F and 13°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 88% of years.

Warmth for growing adds up to 1,962 growing degree days a year (base 50°F), fewer than at 96% of the 173 New York stations. 31% of them (618) have built up by the end of June, and July adds the most, 516. Precipitation totals 39.7 inches a year, most in July (4.2") and least in February (1.9"); May to September bring 49% of it.

The nearest other station, Wellsville Municipal Airport, NY, 3 miles northwest of Wellsville and 614 feet higher, has a last frost 11 days earlier (May 4), a first frost 12 days later (October 14), a season 23 days longer.

The first measurable snow (0.1 inch or more) in Wellsville usually arrives around November 13, and the last of the season around April 6. Those are the middle dates across the winters of 1991–2020 at Wellsville, NY, 1.5 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 39 days after the last snow.

ZIP 14895 is 2 miles from Wellsville, NY, which stands at 1,510 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 14895 in zone 5b, the band where the coldest night of the year averaged -15 to -10°F (-26.1 to -23.3°C) over 1991–2020; a zone describes winter lows, not frost dates.