Frost Dates for 44677 — Smithville, Ohio

Half of springs at Wooster Wayne Co Airport, OH see their last 32°F night by April 29; 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 4 leaves a 30% risk of a frost on them, after May 9 20%, and after May 15 10%. The 16 days between the even-odds date and the one-in-ten date is narrower than at 53% of the 148 Ohio stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 14 in half of years, as early as September 29 one year in ten, and holds off past October 29 one year in ten. A hard freeze of 28°F follows 14 days later, around October 28; in spring the one-in-ten date for 28°F is May 1, 14 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 186 days one year in ten and falls short of 146 one year in ten. On average 129 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 9 days longer, to about May 8, and return around October 1. Severe cold of 16°F or below comes every winter, usually between December 2 and March 14.

July is the warmest month at Wooster Wayne Co Airport, OH, averaging 82°F by day and 61°F at night; January is the coldest at 34°F and 18°F. A freezing night is all but certain in every month from October to April (a 90% chance or more). From June to August the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 42% of years.

Warmth for growing adds up to 2,775 growing degree days a year (base 50°F), fewer than at 91% of the 148 Ohio stations. 35% of them (980) have built up by the end of June, and July adds the most, 665. Precipitation totals 36.8 inches a year, most in June (4.0") and least in February (1.9"); May to September bring 49% of it.

The nearest other station, Wooster Exp Station, OH, 6 miles southwest of Smithville, has a last frost 1 day later (April 30), a first frost 2 days earlier (October 12), a season 4 days shorter.

The first measurable snow (0.1 inch or more) in Smithville 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 Wooster Exp Station, OH, 6.4 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 29 days after the last snow.

ZIP 44677 is 2 miles from Wooster Wayne Co Airport, OH, which stands at 1,137 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 44667 (Orrville). The 2023 USDA Plant Hardiness Zone Map lists ZIP 44677 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.