Frost Dates for 16651 — Houtzdale, Pennsylvania

Half of springs at Philipsburg 2 S, PA see their last 32°F night by May 13; only one in ten is past it by April 25, and one in ten still has one after May 29. Planting tender crops after May 21 leaves a 30% risk of a frost on them, after May 24 20%, and after May 29 10%. The 16 days between the even-odds date and the one-in-ten date is narrower than at 51% 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 18 one year in ten. A hard freeze of 28°F follows 15 days later, around October 16; in spring the one-in-ten date for 28°F is May 20, 9 days before the 32°F one. The freeze-free season lasts 142 days in a typical year, shorter than at 93% of the 176 Pennsylvania stations; it reaches 167 days one year in ten and falls short of 120 one year in ten. On average 145 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 27, and return around September 22. Severe cold of 16°F or below comes every winter, usually between November 24 and March 27.

July is the warmest month at Philipsburg 2 S, PA, averaging 80°F by day and 57°F at night; January is the coldest at 32°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 76% of years.

Warmth for growing adds up to 2,232 growing degree days a year (base 50°F), fewer than at 89% of the 176 Pennsylvania stations. 33% of them (737) have built up by the end of June, and July adds the most, 567. Precipitation totals 42.0 inches a year, most in June (4.1") and least in February (2.5"); May to September bring 46% of it.

The nearest other station, Grampian 1E, PA, 15 miles northwest of Houtzdale and 210 feet lower, has a last frost 9 days earlier (May 4), a first frost 12 days later (October 13), a season 18 days longer.

The first measurable snow (0.1 inch or more) in Houtzdale usually arrives around November 8, and the last of the season around April 8. Those are the middle dates across the winters of 1991–2020 at Philipsburg 2 S, 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 35 days after the last snow.

ZIP 16651 is 8 miles from Philipsburg 2 S, PA, which stands at 1,720 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 16686 (Tyrone). The 2023 USDA Plant Hardiness Zone Map lists ZIP 16651 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.