Frost Dates for 44003 — Andover, Ohio

Half of springs at Dorset, OH see their last 32°F night by May 10; only one in ten is past it by April 25, and one in ten still has one after May 27. Planting tender crops after May 18 leaves a 30% risk of a frost on them, after May 22 20%, and after May 27 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 10 in half of years, as early as September 26 one year in ten, and holds off past October 27 one year in ten. A hard freeze of 28°F follows 16 days later, around October 26; in spring the one-in-ten date for 28°F is May 16, 11 days before the 32°F one. The freeze-free season lasts 154 days in a typical year, the shortest of the 148 Ohio stations; it reaches 176 days one year in ten and falls short of 131 one year in ten. On average 142 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 22, and return around September 29. Severe cold of 16°F or below comes every winter, usually between December 1 and March 24.

July is the warmest month at Dorset, OH, averaging 81°F by day and 59°F at night; January is the coldest at 32°F and 17°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 75% of years.

Warmth for growing adds up to 2,495 growing degree days a year (base 50°F), fewer than at 99% of the 148 Ohio stations. 33% of them (825) have built up by the end of June, and July adds the most, 608. Precipitation totals 47.0 inches a year, most in June (5.0") and least in February (2.6"); May to September bring 48% of it.

The nearest other station, Linesville 1 S, PA, 7 miles east of Andover, has a last frost 10 days earlier (April 30), a first frost 13 days later (October 23), a season 23 days longer.

The first measurable snow (0.1 inch or more) in Andover usually arrives around November 13, and the last of the season around April 6. Those are the middle dates across the winters of 1991–2020 at Dorset, OH, 7.3 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 34 days after the last snow.

ZIP 44003 is 7 miles from Dorset, OH, which stands at 980 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 44076 (Orwell). The 2023 USDA Plant Hardiness Zone Map lists ZIP 44003 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.