Frost Dates for 14150 — Tonawanda, New York

Half of springs at N Tonawanda, NY see their last 32°F night by May 6; only one in ten is past it by April 24, and one in ten still has one after May 19. Planting tender crops after May 11 leaves a 30% risk of a frost on them, after May 15 20%, and after May 19 10%. The 13 days between the even-odds date and the one-in-ten date is narrower than at 83% of the 173 New York stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 15 in half of years, as early as September 30 one year in ten, and holds off past October 30 one year in ten. A hard freeze of 28°F follows 14 days later, around October 29; in spring the one-in-ten date for 28°F is May 10, 9 days before the 32°F one. The freeze-free season lasts 160 days in a typical year, shorter than at 53% of the 173 New York stations; it reaches 181 days one year in ten and falls short of 141 one year in ten. On average 133 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 9 days longer, to about May 15, and return around October 2. Severe cold of 16°F or below comes every winter, usually between November 30 and March 23.

July is the warmest month at N Tonawanda, NY, averaging 83°F by day and 59°F at night; January is the coldest at 33°F and 17°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 67% of years.

Warmth for growing adds up to 2,582 growing degree days a year (base 50°F), more than at 58% of the 173 New York stations. 32% of them (823) have built up by the end of June, and July adds the most, 649. Precipitation totals 40.1 inches a year, most in September (3.9") and least in February (2.4"); May to September bring 43% of it.

The nearest other station, Buffalo, NY, 7 miles southeast of Tonawanda, has a last frost 12 days earlier (April 24), a first frost 11 days later (October 26), a season 23 days longer.

The first measurable snow (0.1 inch or more) in Tonawanda usually arrives around November 11, and the last of the season around April 13. Those are the middle dates across the winters of 1991–2020 at N Tonawanda, 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 23 days after the last snow.

ZIP 14150 is 4 miles from N Tonawanda, NY, which stands at 578 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 4 other ZIP codes share the station; its figures are presented in full for 14120 (North Tonawanda). The 2023 USDA Plant Hardiness Zone Map lists ZIP 14150 in zone 6b, the band where the coldest night of the year averaged -5 to 0°F (-20.6 to -17.8°C) over 1991–2020; a zone describes winter lows, not frost dates.