Frost Dates for 15059 — Midland, Pennsylvania

Half of springs at Montgomery L&D, PA see their last 32°F night by April 28; only one in ten is past it by April 15, and one in ten still has one after May 15. Planting tender crops after May 5 leaves a 30% risk of a frost on them, after May 9 20%, and after May 15 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 26 in half of years, as early as October 9 one year in ten, and holds off past November 6 one year in ten. A hard freeze of 28°F follows 9 days later, around November 4; in spring the one-in-ten date for 28°F is May 4, 11 days before the 32°F one. The freeze-free season lasts 178 days in a typical year, longer than at 61% of the 176 Pennsylvania stations; it reaches 197 days one year in ten and falls short of 156 one year in ten. On average 111 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 9, and return around October 13. Severe cold of 16°F or below comes every winter, usually between December 10 and March 11.

July is the warmest month at Montgomery L&D, PA, averaging 82°F by day and 62°F at night; January is the coldest at 35°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 41% of years.

Warmth for growing adds up to 2,917 growing degree days a year (base 50°F), fewer than at 54% of the 176 Pennsylvania stations. 33% of them (977) have built up by the end of June, and July adds the most, 676. Precipitation totals 40.7 inches a year, most in July (4.4") and least in February (2.5"); May to September bring 49% of it.

The nearest other station, Beaver Falls 1 NE, PA, 11 miles northeast of Midland, has a last frost 1 day earlier (April 27), a first frost 1 day earlier (October 25).

The first measurable snow (0.1 inch or more) in Midland usually arrives around December 17, and the last of the season around March 6. Those are the middle dates across the winters of 1991–2020 at Montgomery L&D, PA, 4.5 miles away: half of years saw snow earlier, half later. Snow fell in 87% of those winters. The last 32°F night of spring typically comes 53 days after the last snow.

ZIP 15059 is 5 miles from Montgomery L&D, PA, which stands at 690 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 5 other ZIP codes share the station; its figures are presented in full for 15009 (Beaver). The 2023 USDA Plant Hardiness Zone Map lists ZIP 15059 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.