Frost Dates for 15834 — Emporium, Pennsylvania

Half of springs at Emporium, PA see their last 32°F night by May 7; only one in ten is past it by April 23, and one in ten still has one after May 23. Planting tender crops after May 13 leaves a 30% risk of a frost on them, after May 18 20%, and after May 23 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 15 in half of years, as early as October 1 one year in ten, and holds off past November 1 one year in ten. A hard freeze of 28°F follows 13 days later, around October 28; in spring the one-in-ten date for 28°F is May 13, 10 days before the 32°F one. The freeze-free season lasts 160 days in a typical year, shorter than at 73% of the 176 Pennsylvania stations; it reaches 182 days one year in ten and falls short of 138 one year in ten. On average 152 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 19, and return around October 3. Severe cold of 16°F or below comes every winter, usually between November 28 and March 22.

July is the warmest month at Emporium, PA, averaging 82°F by day and 59°F at night; January is the coldest at 33°F and 16°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 68% of years.

Warmth for growing adds up to 2,563 growing degree days a year (base 50°F), fewer than at 76% of the 176 Pennsylvania stations. 33% of them (838) have built up by the end of June, and July adds the most, 631. Precipitation totals 44.0 inches a year, most in July (4.5") and least in February (2.3"); May to September bring 48% of it.

The nearest other station, Clermont 1 NW, PA, 18 miles northwest of Emporium and 1,040 feet higher, has a last frost 8 days later (May 15), a first frost 12 days earlier (October 3), a season 20 days shorter.

The first measurable snow (0.1 inch or more) in Emporium usually arrives around November 16, and the last of the season around March 26. Those are the middle dates across the winters of 1991–2020 at Emporium, PA, 1.5 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 42 days after the last snow.

ZIP 15834 is 2 miles from Emporium, PA, which stands at 1,040 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 15834 in zone 5b, the band where the coldest night of the year averaged -15 to -10°F (-26.1 to -23.3°C) over 1991–2020; a zone describes winter lows, not frost dates.