Frost Dates for 14489 — Lyons, New York

Half of springs at Sodus 1W, 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 21. Planting tender crops after May 13 leaves a 30% risk of a frost on them, after May 16 20%, and after May 21 10%. The 15 days between the even-odds date and the one-in-ten date is narrower than at 29% of the 173 New York stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 10 in half of years, as early as September 27 one year in ten, and holds off past October 28 one year in ten. A hard freeze of 28°F follows 15 days later, around October 25; in spring the one-in-ten date for 28°F is May 12, 9 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 177 days one year in ten and falls short of 138 one year in ten. On average 132 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 13 days longer, to about May 19, and return around September 29. Severe cold of 16°F or below comes every winter, usually between December 1 and March 23.

July is the warmest month at Sodus 1W, NY, averaging 79°F by day and 59°F at night; January is the coldest at 31°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 August the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 69% of years.

Warmth for growing adds up to 2,312 growing degree days a year (base 50°F), fewer than at 61% of the 173 New York stations. 31% of them (719) have built up by the end of June, and July adds the most, 589. Precipitation totals 40.0 inches a year, most in October (4.3") and least in February (2.5"); May to September bring 44% of it.

The nearest other station, Geneva Rsch Farm, NY, 14 miles south of Lyons and 274 feet higher, has a last frost 6 days earlier (April 30), a first frost 11 days later (October 21), a season 15 days longer.

The first measurable snow (0.1 inch or more) in Lyons usually arrives around November 16, and the last of the season around April 7. Those are the middle dates across the winters of 1991–2020 at Sodus 1W, 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 29 days after the last snow.

ZIP 14489 is 12 miles from Sodus 1W, NY, which stands at 444 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 6 other ZIP codes share the station; its figures are presented in full for 14589 (Williamson). The 2023 USDA Plant Hardiness Zone Map lists ZIP 14489 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.