Frost Dates for 16646 — Hastings, Pennsylvania

Half of springs at Prince Gallitzin Sp, PA see their last 32°F night by May 10; only one in ten is past it by April 25, and one in ten still has one after May 28. Planting tender crops after May 19 leaves a 30% risk of a frost on them, after May 24 20%, and after May 28 10%. The 18 days between the even-odds date and the one-in-ten date is wider than at 70% of the 176 Pennsylvania stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 5 in half of years, as early as September 24 one year in ten, and holds off past October 21 one year in ten. A hard freeze of 28°F follows 13 days later, around October 18; in spring the one-in-ten date for 28°F is May 18, 10 days before the 32°F one. The freeze-free season lasts 149 days in a typical year, shorter than at 88% of the 176 Pennsylvania stations; it reaches 171 days one year in ten and falls short of 127 one year in ten. On average 154 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 14 days longer, to about May 24, and return around September 26. Severe cold of 16°F or below comes every winter, usually between November 24 and March 26.

July is the warmest month at Prince Gallitzin Sp, PA, averaging 82°F by day and 58°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 72% of years.

Warmth for growing adds up to 2,481 growing degree days a year (base 50°F), fewer than at 80% of the 176 Pennsylvania stations. 33% of them (829) have built up by the end of June, and July adds the most, 614. Precipitation totals 40.8 inches a year, most in September (4.1") and least in February (2.5"); May to September bring 48% of it.

The nearest other station, Ebensburg Sewage Plt, PA, 14 miles south of Hastings and 420 feet higher, has a last frost 7 days later (May 17), a first frost 3 days earlier (October 2), a season 13 days shorter.

The first measurable snow (0.1 inch or more) in Hastings usually arrives around November 27, and the last of the season around April 1. Those are the middle dates across the winters of 1991–2020 at Prince Gallitzin Sp, PA, 8.2 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 39 days after the last snow.

ZIP 16646 is 8 miles from Prince Gallitzin Sp, PA, which stands at 1,520 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 4 other ZIP codes share the station; its figures are presented in full for 15714 (Northern Cambria). The 2023 USDA Plant Hardiness Zone Map lists ZIP 16646 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.