Frost Dates for 44030 — Conneaut, Ohio

Half of springs at Springboro 3 WNW, PA see their last 32°F night by May 8; 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 14 leaves a 30% risk of a frost on them, after May 18 20%, and after May 23 10%. The 15 days between the even-odds date and the one-in-ten date is narrower than at 77% of the 148 Ohio stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 16 in half of years, as early as October 1 one year in ten, and holds off past November 2 one year in ten. A hard freeze of 28°F follows 16 days later, around November 1; in spring the one-in-ten date for 28°F is May 14, 9 days before the 32°F one. The freeze-free season lasts 160 days in a typical year, shorter than at 97% of the 148 Ohio stations; it reaches 183 days one year in ten and falls short of 136 one year in ten. On average 141 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 20, and return around October 2. Severe cold of 16°F or below comes every winter, usually between December 6 and March 22.

July is the warmest month at Springboro 3 WNW, PA, averaging 80°F by day and 58°F at night; January is the coldest at 32°F and 17°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 69% of years.

Warmth for growing adds up to 2,397 growing degree days a year (base 50°F), the fewest of the 148 Ohio stations. 32% of them (775) have built up by the end of June, and July adds the most, 587. Precipitation totals 48.3 inches a year, most in October (4.8") and least in February (2.6"); May to September bring 46% of it.

The nearest other station, Ashtabula Co Airport, OH, 12 miles southwest of Conneaut, has a last frost 6 days earlier (May 2), a first frost 5 days later (October 21), a season 11 days longer.

The first measurable snow (0.1 inch or more) in Conneaut usually arrives around November 9, and the last of the season around April 11. Those are the middle dates across the winters of 1991–2020 at Springboro 3 WNW, PA, 11.4 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 27 days after the last snow.

ZIP 44030 is 11 miles from Springboro 3 WNW, PA, which stands at 1,005 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 44030 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.