Frost Dates for 14739 — Friendship, New York

Half of springs at Wellsville Municipal Airport, NY see their last 32°F night by May 4; only one in ten is past it by April 20, and one in ten still has one after May 21. Planting tender crops after May 10 leaves a 30% risk of a frost on them, after May 16 20%, and after May 21 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 14 in half of years, as early as September 29 one year in ten, and holds off past November 1 one year in ten. A hard freeze of 28°F follows 17 days later, around October 31; in spring the one-in-ten date for 28°F is May 11, 10 days before the 32°F one. The freeze-free season lasts 163 days in a typical year, longer than at 50% of the 173 New York stations; it reaches 185 days one year in ten and falls short of 140 one year in ten. On average 145 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 16, and return around October 1. Severe cold of 16°F or below comes every winter, usually between December 1 and March 24.

July is the warmest month at Wellsville Municipal Airport, NY, averaging 78°F by day and 59°F at night; January is the coldest at 29°F and 17°F. A freezing night is all but certain in every month from November 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 61% of years.

Warmth for growing adds up to 2,229 growing degree days a year (base 50°F), fewer than at 75% of the 173 New York stations. 32% of them (718) have built up by the end of June, and July adds the most, 570. Precipitation totals 37.3 inches a year, most in July (4.2") and least in February (1.6"); May to September bring 50% of it.

The nearest other station, Angelica, NY, 10 miles northeast of Friendship and 649 feet lower, has a last frost 17 days later (May 21), a first frost 14 days earlier (September 30), a season 33 days shorter.

The first measurable snow (0.1 inch or more) in Friendship usually arrives around November 6, and the last of the season around April 8. Those are the middle dates across the winters of 1991–2020 at Friendship 7 SW, NY, 6.1 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 26 days after the last snow.

ZIP 14739 is 10 miles from Wellsville Municipal Airport, NY, which stands at 2,124 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 14739 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.