Frost Dates for 17813 — Beavertown, Pennsylvania

Half of springs at Laurelton Ctr, PA see their last 32°F night by April 25; only one in ten is past it by April 12, 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 5 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 19 in half of years, as early as October 4 one year in ten, and holds off past November 2 one year in ten. A hard freeze of 28°F follows 14 days later, around November 2; in spring the one-in-ten date for 28°F is April 28, 13 days before the 32°F one. The freeze-free season lasts 175 days in a typical year, shorter than at 48% of the 176 Pennsylvania stations; it reaches 196 days one year in ten and falls short of 157 one year in ten. On average 142 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 10 days longer, to about May 5, and return around October 7. Severe cold of 16°F or below comes every winter, usually between December 9 and March 11.

July is the warmest month at Laurelton Ctr, PA, averaging 85°F by day and 62°F at night; January is the coldest at 36°F and 21°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 31% of years.

Warmth for growing adds up to 3,160 growing degree days a year (base 50°F), more than at 66% of the 176 Pennsylvania stations. 35% of them (1,096) have built up by the end of June, and July adds the most, 739.

The nearest other station, Selinsgrove 2 S, PA, 17 miles east of Beavertown and 380 feet lower, has the same 50% last-frost date, a first frost 3 days later (October 22), a season 3 days longer.

The first measurable snow (0.1 inch or more) in Beavertown usually arrives around December 6, and the last of the season around March 17. Those are the middle dates across the winters of 1991–2020 at Beavertown 1 NE, PA, 1.2 miles away: half of years saw snow earlier, half later. Snow fell in 94% of those winters. The last 32°F night of spring typically comes 39 days after the last snow.

ZIP 17813 is 9 miles from Laurelton Ctr, PA, which stands at 800 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station; its figures are presented in full for 17844 (Mifflinburg). The 2023 USDA Plant Hardiness Zone Map lists ZIP 17813 in zone 6b, the band where the coldest night of the year averaged -5 to 0°F (-20.6 to -17.8°C) over 1991–2020; a zone describes winter lows, not frost dates.