Frost Dates for 15537 — Everett, Pennsylvania

Half of springs at Everett, PA see their last 32°F night by April 27; only one in ten is past it by April 12, and one in ten still has one after May 16. Planting tender crops after May 4 leaves a 30% risk of a frost on them, after May 9 20%, and after May 16 10%. The 19 days between the even-odds date and the one-in-ten date is wider than at 90% of the 176 Pennsylvania stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 17 in half of years, as early as October 3 one year in ten, and holds off past November 1 one year in ten. A hard freeze of 28°F follows 12 days later, around October 29; in spring the one-in-ten date for 28°F is May 1, 15 days before the 32°F one. The freeze-free season lasts 170 days in a typical year, shorter than at 60% of the 176 Pennsylvania stations; it reaches 192 days one year in ten and falls short of 147 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 12 days longer, to about May 9, and return around October 6. Severe cold of 16°F or below comes every winter, usually between December 7 and March 8.

July is the warmest month at Everett, PA, averaging 85°F by day and 61°F at night; January is the coldest at 39°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 39% of years.

Warmth for growing adds up to 3,021 growing degree days a year (base 50°F), more than at 53% of the 176 Pennsylvania stations. 34% of them (1,024) have built up by the end of June, and July adds the most, 710. Precipitation totals 40.4 inches a year, most in May (4.2") and least in February (2.2"); May to September bring 48% of it.

The nearest other station, Wolfsburg, PA, 9 miles west of Everett and 185 feet higher, has a last frost 2 days later (April 29), a first frost 4 days earlier (October 13), a season 3 days shorter.

The first measurable snow (0.1 inch or more) in Everett usually arrives around December 14, and the last of the season around March 15. Those are the middle dates across the winters of 1991–2020 at Everett, PA, 0.7 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 43 days after the last snow.

ZIP 15537 is under a mile from Everett, PA, which stands at 1,000 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 15537 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.