Frost Dates for 12771 — Port Jervis, New York

Half of springs at Port Jervis, NY see their last 32°F night by May 5; only one in ten is past it by April 22, 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 14 20%, and after May 19 10%. The 14 days between the even-odds date and the one-in-ten date is narrower than at 63% 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 28 one year in ten, and holds off past October 29 one year in ten. A hard freeze of 28°F follows 14 days later, around October 24; in spring the one-in-ten date for 28°F is May 8, 11 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 178 days one year in ten and falls short of 139 one year in ten. On average 143 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 11 days longer, to about May 16, and return around October 2. Severe cold of 16°F or below comes every winter, usually between November 28 and March 18.

July is the warmest month at Port Jervis, NY, averaging 84°F by day and 60°F at night; January is the coldest at 34°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 66% of years.

Warmth for growing adds up to 2,664 growing degree days a year (base 50°F), more than at 65% of the 173 New York stations. 33% of them (870) have built up by the end of June, and July adds the most, 676. Precipitation totals 47.2 inches a year, most in June (4.7") and least in February (2.6"); May to September bring 47% of it.

The nearest other station, Matamoras, PA, 3 miles west of Port Jervis, has a last frost 3 days earlier (May 2), a first frost 2 days later (October 12), a season 6 days longer.

The first measurable snow (0.1 inch or more) in Port Jervis usually arrives around December 5, and the last of the season around March 27. Those are the middle dates across the winters of 1991–2020 at Port Jervis, NY, 1.7 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 39 days after the last snow.

ZIP 12771 is 2 miles from Port Jervis, NY, which stands at 580 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 12771 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.