Frost Dates for 16912 — Blossburg, Pennsylvania

Half of springs at Canton, PA see their last 32°F night by May 16; only one in ten is past it by April 27, and one in ten still has one after May 29. Planting tender crops after May 22 leaves a 30% risk of a frost on them, after May 26 20%, and after May 29 10%. The 13 days between the even-odds date and the one-in-ten date is narrower than at 94% of the 176 Pennsylvania stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 2 in half of years, as early as September 18 one year in ten, and holds off past October 16 one year in ten. A hard freeze of 28°F follows 11 days later, around October 13; in spring the one-in-ten date for 28°F is May 19, 10 days before the 32°F one. The freeze-free season lasts 139 days in a typical year, shorter than at 96% of the 176 Pennsylvania stations; it reaches 159 days one year in ten and falls short of 118 one year in ten. On average 160 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 29, and return around September 22. Severe cold of 16°F or below comes every winter, usually between November 21 and March 27.

July is the warmest month at Canton, PA, averaging 81°F by day and 57°F at night; January is the coldest at 33°F and 15°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 83% of years.

Warmth for growing adds up to 2,272 growing degree days a year (base 50°F), fewer than at 87% of the 176 Pennsylvania stations. 32% of them (731) have built up by the end of June, and July adds the most, 587. Precipitation totals 41.2 inches a year, most in September (4.3") and least in February (2.1"); May to September bring 47% of it.

The nearest other station, Tioga Hammond Dam, PA, 16 miles north of Blossburg, has a last frost 10 days earlier (May 6), a first frost 8 days later (October 10), a season 19 days longer.

The first measurable snow (0.1 inch or more) in Blossburg usually arrives around November 12, and the last of the season around April 8. Those are the middle dates across the winters of 1991–2020 at Covington 2 WSW, PA, 5 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 38 days after the last snow.

ZIP 16912 is 11 miles from Canton, PA, which stands at 1,140 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 17724 (Canton). The 2023 USDA Plant Hardiness Zone Map lists ZIP 16912 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.