Frost Dates for 13667 — Norfolk, New York

Half of springs at Massena International Airport, NY see their last 32°F night by May 8; only one in ten is past it by April 27, and one in ten still has one after May 23. Planting tender crops after May 14 leaves a 30% risk of a frost on them, after May 18 20%, and after May 23 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 1 in half of years, as early as September 17 one year in ten, and holds off past October 17 one year in ten. A hard freeze of 28°F follows 12 days later, around October 13; in spring the one-in-ten date for 28°F is May 13, 10 days before the 32°F one. The freeze-free season lasts 144 days in a typical year, shorter than at 83% of the 173 New York stations; it reaches 163 days one year in ten and falls short of 125 one year in ten. On average 158 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 19, and return around September 21. Severe cold of 16°F or below comes every winter, usually between November 15 and March 31.

July is the warmest month at Massena International Airport, NY, averaging 81°F by day and 58°F at night; January is the coldest at 25°F and 6°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 78% of years.

Warmth for growing adds up to 2,229 growing degree days a year (base 50°F), fewer than at 74% of the 173 New York stations. 31% of them (700) have built up by the end of June, and July adds the most, 604. Precipitation totals 33.9 inches a year, most in June (3.7") and least in February (1.6"); May to September bring 51% of it.

The nearest other station, Lawrenceville 3 SW, NY, 15 miles east of Norfolk and 252 feet higher, has a last frost 2 days later (May 10), a first frost 4 days later (October 5), a season 4 days longer.

The first measurable snow (0.1 inch or more) in Norfolk usually arrives around November 3, and the last of the season around April 16. Those are the middle dates across the winters of 1991–2020 at Lawrenceville 3 SW, NY, 15.4 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 22 days after the last snow.

ZIP 13667 is 10 miles from Massena International Airport, NY, which stands at 214 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 3 other ZIP codes share the station; its figures are presented in full for 13662 (Massena). The 2023 USDA Plant Hardiness Zone Map lists ZIP 13667 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.