Frost Dates for 16915 — Coudersport, Pennsylvania

Half of springs at Coudersport 1 SW, PA see their last 32°F night by May 22; only one in ten is past it by May 6, and one in ten still has one after June 6. Planting tender crops after May 29 leaves a 30% risk of a frost on them, after June 1 20%, and after June 6 10%. The 15 days between the even-odds date and the one-in-ten date is narrower than at 72% of the 176 Pennsylvania 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 19 one year in ten, and holds off past October 13 one year in ten. A hard freeze of 28°F follows 10 days later, around October 11; in spring the one-in-ten date for 28°F is May 28, 9 days before the 32°F one. The freeze-free season lasts 130 days in a typical year, shorter than at 99% of the 176 Pennsylvania stations; it reaches 152 days one year in ten and falls short of 110 one year in ten. On average 170 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 June 3, and return around September 21. Severe cold of 16°F or below comes every winter, usually between November 16 and April 2.

July is the warmest month at Coudersport 1 SW, PA, averaging 80°F by day and 54°F at night; January is the coldest at 31°F and 13°F. A freezing night is all but certain in every month from October to May (a 90% chance or more). From July to August the chance of a 32°F night stays under 10% each month. In spring, June still brings one in 22% of years.

Warmth for growing adds up to 1,974 growing degree days a year (base 50°F), fewer than at 98% of the 176 Pennsylvania stations. 32% of them (624) have built up by the end of June, and July adds the most, 518. Precipitation totals 44.1 inches a year, most in July (4.7") and least in February (2.4"); May to September bring 48% of it.

The nearest other station, Oswayo 1 ENE, PA, 9 miles north of Coudersport, has a last frost 2 days earlier (May 20), a first frost 2 days earlier (September 29).

The first measurable snow (0.1 inch or more) in Coudersport usually arrives around November 16, and the last of the season around April 11. Those are the middle dates across the winters of 1991–2020 at Coudersport 1 SW, PA, 3.9 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 41 days after the last snow.

ZIP 16915 is 4 miles from Coudersport 1 SW, PA, which stands at 1,650 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 16915 in zone 5b, the band where the coldest night of the year averaged -15 to -10°F (-26.1 to -23.3°C) over 1991–2020; a zone describes winter lows, not frost dates.