Frost Dates for 44504 — Youngstown, Ohio

Half of springs at Youngstown Regional Airport, OH see their last 32°F night by May 1; only one in ten is past it by April 16, and one in ten still has one after May 20. Planting tender crops after May 9 leaves a 30% risk of a frost on them, after May 15 20%, and after May 20 10%. The 19 days between the even-odds date and the one-in-ten date is wider than at 92% of the 148 Ohio 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 1 one year in ten, and holds off past November 1 one year in ten. A hard freeze of 28°F follows 15 days later, around November 1; in spring the one-in-ten date for 28°F is May 7, 13 days before the 32°F one. The freeze-free season lasts 167 days in a typical year, shorter than at 87% of the 148 Ohio stations; it reaches 190 days one year in ten and falls short of 145 one year in ten. On average 127 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 15 days longer, to about May 16, and return around October 5. Severe cold of 16°F or below comes every winter, usually between December 7 and March 18.

July is the warmest month at Youngstown Regional Airport, OH, averaging 83°F by day and 60°F at night; January is the coldest at 34°F and 19°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 51% of years.

Warmth for growing adds up to 2,840 growing degree days a year (base 50°F), fewer than at 89% of the 148 Ohio stations. 34% of them (975) have built up by the end of June, and July adds the most, 666. Precipitation totals 41.2 inches a year, most in July (4.3") and least in February (2.5"); May to September bring 47% of it.

The nearest other station, Warren 3 S, OH, 10 miles northwest of Youngstown and 280 feet lower, has a last frost 7 days later (May 8), a first frost 5 days earlier (October 12), a season 10 days shorter.

The first measurable snow (0.1 inch or more) in Youngstown usually arrives around November 7, and the last of the season around April 7. Those are the middle dates across the winters of 1991–2020 at Youngstown Regional Airport, OH, 9.1 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 24 days after the last snow.

ZIP 44504 is 9 miles from Youngstown Regional Airport, OH, which stands at 1,180 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 13 other ZIP codes share the station; its figures are presented in full for 16148 (Hermitage). The 2023 USDA Plant Hardiness Zone Map lists ZIP 44504 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.