Frost Dates for 13790 — Johnson City, New York

Half of springs at Binghamton, NY see their last 32°F night by May 2; only one in ten is past it by April 19, and one in ten still has one after May 18. Planting tender crops after May 7 leaves a 30% risk of a frost on them, after May 11 20%, and after May 18 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 28 one year in ten, and holds off past October 29 one year in ten. A hard freeze of 28°F follows 15 days later, around October 26; in spring the one-in-ten date for 28°F is May 7, 11 days before the 32°F one. The freeze-free season lasts 162 days in a typical year, shorter than at 50% of the 173 New York stations; it reaches 182 days one year in ten and falls short of 140 one year in ten. On average 142 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 13, and return around September 30. Severe cold of 16°F or below comes every winter, usually between November 29 and March 24.

July is the warmest month at Binghamton, NY, averaging 78°F by day and 59°F at night; January is the coldest at 30°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 54% of years.

Warmth for growing adds up to 2,267 growing degree days a year (base 50°F), fewer than at 68% of the 173 New York stations. 32% of them (727) have built up by the end of June, and July adds the most, 586. Precipitation totals 42.1 inches a year, most in June (4.7") and least in February (2.4"); May to September bring 48% of it.

The nearest other station, Endicott, NY, 7 miles southwest of Johnson City and 779 feet lower, has a last frost 3 days later (May 5), a first frost 1 day later (October 12), a season 3 days shorter.

The first measurable snow (0.1 inch or more) in Johnson City usually arrives around November 3, and the last of the season around April 10. Those are the middle dates across the winters of 1991–2020 at Binghamton, NY, 5.2 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 13790 is 5 miles from Binghamton, NY, which stands at 1,606 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 9 other ZIP codes share the station; its figures are presented in full for 13905 (Binghamton). The 2023 USDA Plant Hardiness Zone Map lists ZIP 13790 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.