Frost Dates for 12543 — Maybrook, New York

Half of springs at Montgomery Orange Airport, NY see their last 32°F night by May 1; only one in ten is past it by April 18, and one in ten still has one after May 17. Planting tender crops after May 9 leaves a 30% risk of a frost on them, after May 12 20%, and after May 17 10%. The 16 days between the even-odds date and the one-in-ten date is wider than at 71% of the 173 New York stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 11 in half of years, as early as September 30 one year in ten, and holds off past October 27 one year in ten. A hard freeze of 28°F follows 13 days later, around October 24; in spring the one-in-ten date for 28°F is May 4, 13 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 183 days one year in ten and falls short of 142 one year in ten. On average 138 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 13, and return around October 1. Severe cold of 16°F or below comes every winter, usually between December 1 and March 14.

July is the warmest month at Montgomery Orange Airport, NY, averaging 84°F by day and 61°F at night; January is the coldest at 35°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 52% of years.

Warmth for growing adds up to 2,726 growing degree days a year (base 50°F), more than at 70% of the 173 New York stations. 33% of them (888) have built up by the end of June, and July adds the most, 688. Precipitation totals 41.0 inches a year, most in August (4.4") and least in January (2.4"); May to September bring 47% of it.

The nearest other station, Walden 1 ESE, NY, 5 miles northeast of Maybrook, has a last frost 2 days earlier (April 29), the same first-frost date, a season 1 day longer.

The first measurable snow (0.1 inch or more) in Maybrook usually arrives around December 6, and the last of the season around March 22. Those are the middle dates across the winters of 1991–2020 at Walden 1 ESE, NY, 5.4 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 40 days after the last snow.

ZIP 12543 is 3 miles from Montgomery Orange Airport, NY, which stands at 365 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 5 other ZIP codes share the station; its figures are presented in full for 10918 (Chester). The 2023 USDA Plant Hardiness Zone Map lists ZIP 12543 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.