Frost Dates for 16424 — Linesville, Pennsylvania

Half of springs at Linesville 1 S, PA see their last 32°F night by April 30; only one in ten is past it by April 16, and one in ten still has one after May 17. Planting tender crops after May 6 leaves a 30% risk of a frost on them, after May 11 20%, and after May 17 10%. The 17 days between the even-odds date and the one-in-ten date is wider than at 50% of the 176 Pennsylvania stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 23 in half of years, as early as October 6 one year in ten, and holds off past November 6 one year in ten. A hard freeze of 28°F follows 13 days later, around November 5; in spring the one-in-ten date for 28°F is May 3, 14 days before the 32°F one. The freeze-free season lasts 177 days in a typical year, longer than at 56% of the 176 Pennsylvania stations; it reaches 197 days one year in ten and falls short of 154 one year in ten. On average 136 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 11 days longer, to about May 11, and return around October 10. Severe cold of 16°F or below comes every winter, usually between December 8 and March 19.

July is the warmest month at Linesville 1 S, PA, averaging 81°F by day and 61°F at night; January is the coldest at 32°F and 17°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 45% of years.

Warmth for growing adds up to 2,633 growing degree days a year (base 50°F), fewer than at 70% of the 176 Pennsylvania stations. 33% of them (863) have built up by the end of June, and July adds the most, 640. Precipitation totals 42.0 inches a year, most in June (4.7") and least in February (2.0"); May to September bring 49% of it.

The nearest other station, Jamestown 2 NW, PA, 10 miles south of Linesville, has a last frost 4 days later (May 4), a first frost 9 days earlier (October 14), a season 16 days shorter.

The first measurable snow (0.1 inch or more) in Linesville usually arrives around November 22, and the last of the season around April 4. Those are the middle dates across the winters of 1991–2020 at Linesville 1 S, PA, 1 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 26 days after the last snow.

ZIP 16424 is 1 mile from Linesville 1 S, PA, which stands at 1,030 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 16424 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.