Frost Dates for 12883 — Ticonderoga, New York

Half of springs at Cornwall, VT see their last 32°F night by May 5; only one in ten is past it by April 23, and one in ten still has one after May 20. Planting tender crops after May 11 leaves a 30% risk of a frost on them, after May 15 20%, and after May 20 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 3 in half of years, as early as September 21 one year in ten, and holds off past October 19 one year in ten. A hard freeze of 28°F follows 13 days later, around October 16; in spring the one-in-ten date for 28°F is May 8, 12 days before the 32°F one. The freeze-free season lasts 151 days in a typical year, shorter than at 72% of the 173 New York stations; it reaches 169 days one year in ten and falls short of 131 one year in ten. On average 155 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 18, and return around September 25. Severe cold of 16°F or below comes every winter, usually between November 21 and March 30.

July is the warmest month at Cornwall, VT, averaging 80°F by day and 60°F at night; January is the coldest at 27°F and 9°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 68% of years.

Warmth for growing adds up to 2,295 growing degree days a year (base 50°F), fewer than at 62% of the 173 New York stations. 31% of them (721) have built up by the end of June, and July adds the most, 620. Precipitation totals 38.9 inches a year, most in June (4.2") and least in February (2.1"); May to September bring 48% of it.

The nearest other station, Salisbury 2 N, VT, 18 miles east of Ticonderoga, has a last frost 16 days later (May 21), a first frost 7 days earlier (September 26), a season 24 days shorter.

The first measurable snow (0.1 inch or more) in Ticonderoga usually arrives around November 25, and the last of the season around April 7. Those are the middle dates across the winters of 1991–2020 at Cornwall, VT, 13.9 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 28 days after the last snow.

ZIP 12883 is 14 miles from Cornwall, VT, which stands at 345 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station; its figures are presented in full for 05753 (Middlebury). The 2023 USDA Plant Hardiness Zone Map lists ZIP 12883 in zone 4b, the band where the coldest night of the year averaged -25 to -20°F (-31.7 to -28.9°C) over 1991–2020; a zone describes winter lows, not frost dates.