Frost Dates for 45814 — Arlington, Ohio

Half of springs at Findlay Airport, OH see their last 32°F night by April 19; only one in ten is past it by April 5, and one in ten still has one after May 6. Planting tender crops after April 26 leaves a 30% risk of a frost on them, after April 30 20%, and after May 6 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 23 in half of years, as early as October 9 one year in ten, and holds off past November 4 one year in ten. A hard freeze of 28°F follows 11 days later, around November 3; in spring the one-in-ten date for 28°F is April 25, 11 days before the 32°F one. The freeze-free season lasts 185 days in a typical year, longer than at 68% of the 148 Ohio stations; it reaches 204 days one year in ten and falls short of 165 one year in ten. On average 117 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 April 30, and return around October 12. Severe cold of 16°F or below comes every winter, usually between December 7 and March 9.

July is the warmest month at Findlay Airport, OH, averaging 85°F by day and 64°F at night; January is the coldest at 35°F and 20°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 19% of years.

Warmth for growing adds up to 3,456 growing degree days a year (base 50°F), more than at 76% of the 148 Ohio stations. 36% of them (1,228) have built up by the end of June, and July adds the most, 772. Precipitation totals 33.8 inches a year, most in June (3.9") and least in February (1.7"); May to September bring 51% of it.

The nearest other station, Findlay Wpcc, OH, 11 miles north of Arlington, has a last frost 3 days later (April 22), a first frost 1 day later (October 24), a season 2 days shorter.

The first measurable snow (0.1 inch or more) in Arlington usually arrives around November 24, and the last of the season around April 1. Those are the middle dates across the winters of 1991–2020 at Findlay Wpcc, OH, 10.7 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 18 days after the last snow.

ZIP 45814 is 9 miles from Findlay Airport, OH, which stands at 800 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 45814 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.