Frost Dates for 13160 — Union Springs, New York

Half of springs at Aurora Rsch Farm, NY see their last 32°F night by May 1; only one in ten is past it by April 17, and one in ten still has one after May 16. Planting tender crops after May 6 leaves a 30% risk of a frost on them, after May 10 20%, and after May 16 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 21 in half of years, as early as October 4 one year in ten, and holds off past November 5 one year in ten. A hard freeze of 28°F follows 13 days later, around November 3; in spring the one-in-ten date for 28°F is May 3, 13 days before the 32°F one. The freeze-free season lasts 172 days in a typical year, longer than at 69% of the 173 New York stations; it reaches 193 days one year in ten and falls short of 151 one year in ten. On average 131 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 10, and return around October 7. Severe cold of 16°F or below comes every winter, usually between December 5 and March 23.

July is the warmest month at Aurora Rsch Farm, NY, averaging 80°F by day and 61°F at night; January is the coldest at 31°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 September the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 50% of years.

Warmth for growing adds up to 2,527 growing degree days a year (base 50°F), more than at 50% of the 173 New York stations. 32% of them (809) have built up by the end of June, and July adds the most, 629. Precipitation totals 37.1 inches a year, most in June (3.8") and least in February (1.9"); May to September bring 48% of it.

The nearest other station, Auburn, NY, 9 miles northeast of Union Springs, has a last frost 1 day later (May 2), a first frost 3 days earlier (October 18), a season 6 days shorter.

The first measurable snow (0.1 inch or more) in Union Springs usually arrives around November 15, and the last of the season around April 4. Those are the middle dates across the winters of 1991–2020 at Aurora Rsch Farm, NY, 6.8 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 27 days after the last snow.

ZIP 13160 is 7 miles from Aurora Rsch Farm, NY, which stands at 830 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 13118 (Moravia). The 2023 USDA Plant Hardiness Zone Map lists ZIP 13160 in zone 6a, the band where the coldest night of the year averaged -10 to -5°F (-23.3 to -20.6°C) over 1991–2020; a zone describes winter lows, not frost dates.