Frost Dates for 44090 — Wellington, Ohio

Half of springs at Oberlin, OH see their last 32°F night by April 27; only one in ten is past it by April 13, and one in ten still has one after May 14. Planting tender crops after May 3 leaves a 30% risk of a frost on them, after May 8 20%, and after May 14 10%. The 17 days between the even-odds date and the one-in-ten date is narrower than at 24% of the 148 Ohio stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 22 in half of years, as early as October 7 one year in ten, and holds off past November 4 one year in ten. A hard freeze of 28°F follows 12 days later, around November 3; in spring the one-in-ten date for 28°F is May 1, 13 days before the 32°F one. The freeze-free season lasts 178 days in a typical year, shorter than at 54% of the 148 Ohio stations; it reaches 197 days one year in ten and falls short of 155 one year in ten. On average 128 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 10 days longer, to about May 7, and return around October 10. Severe cold of 16°F or below comes every winter, usually between December 5 and March 12.

July is the warmest month at Oberlin, OH, averaging 83°F by day and 62°F at night; January is the coldest at 34°F and 18°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 37% of years.

Warmth for growing adds up to 2,959 growing degree days a year (base 50°F), fewer than at 82% of the 148 Ohio stations. 34% of them (1,014) have built up by the end of June, and July adds the most, 702. Precipitation totals 40.1 inches a year, most in June (4.1") and least in February (2.4"); May to September bring 48% of it.

The nearest other station, Elyria Lorain Co Airport, OH, 14 miles north of Wellington, has a last frost 3 days earlier (April 24), a first frost 2 days later (October 24), a season 4 days longer.

The first measurable snow (0.1 inch or more) in Wellington usually arrives around November 26, and the last of the season around March 31. Those are the middle dates across the winters of 1991–2020 at Oberlin, OH, 9.3 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 27 days after the last snow.

ZIP 44090 is 9 miles from Oberlin, OH, which stands at 816 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 4 other ZIP codes share the station; its figures are presented in full for 44074 (Oberlin). The 2023 USDA Plant Hardiness Zone Map lists ZIP 44090 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.