Frost Dates for 16641 — Gallitzin, Pennsylvania

Half of springs at Altoona 3 W, PA see their last 32°F night by April 25; only one in ten is past it by April 10, and one in ten still has one after May 11. Planting tender crops after May 1 leaves a 30% risk of a frost on them, after May 6 20%, and after May 11 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 21 in half of years, as early as October 5 one year in ten, and holds off past November 5 one year in ten. A hard freeze of 28°F follows 13 days later, around November 3; in spring the one-in-ten date for 28°F is May 1, 10 days before the 32°F one. The freeze-free season lasts 176 days in a typical year, longer than at 52% of the 176 Pennsylvania stations; it reaches 198 days one year in ten and falls short of 155 one year in ten. On average 128 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 9 days longer, to about May 4, and return around October 8. Severe cold of 16°F or below comes every winter, usually between December 7 and March 14.

July is the warmest month at Altoona 3 W, PA, averaging 81°F by day and 61°F at night; January is the coldest at 34°F and 19°F. A freezing night is all but certain in every month from November to April (a 90% chance or more). From June to September the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 33% of years.

Warmth for growing adds up to 2,757 growing degree days a year (base 50°F), fewer than at 63% of the 176 Pennsylvania stations. 34% of them (934) have built up by the end of June, and July adds the most, 662. Precipitation totals 44.7 inches a year, most in May (4.4") and least in February (2.7"); May to September bring 47% of it.

The nearest other station, Altoona 7 SW, PA, 9 miles southeast of Gallitzin, has the same 50% last-frost date, a first frost 1 day earlier (October 20), a season 1 day longer.

The first measurable snow (0.1 inch or more) in Gallitzin usually arrives around November 24, and the last of the season around March 23. Those are the middle dates across the winters of 1991–2020 at Altoona 3 W, PA, 4.7 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 33 days after the last snow.

ZIP 16641 is 5 miles from Altoona 3 W, PA, which stands at 1,320 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 16601 (Altoona). The 2023 USDA Plant Hardiness Zone Map lists ZIP 16641 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.