Frost Dates for 43701 — Zanesville, Ohio

Half of springs at Zanesville Municipal Airport, OH see their last 32°F night by April 26; only one in ten is past it by April 11, 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 7 20%, and after May 14 10%. The 18 days between the even-odds date and the one-in-ten date is wider than at 76% of the 148 Ohio stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 19 in half of years, as early as October 6 one year in ten, and holds off past October 31 one year in ten. A hard freeze of 28°F follows 12 days later, around October 31; in spring the one-in-ten date for 28°F is April 30, 14 days before the 32°F one. The freeze-free season lasts 177 days in a typical year, shorter than at 61% of the 148 Ohio stations; it reaches 195 days one year in ten and falls short of 155 one year in ten. On average 116 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 6, and return around October 7. Severe cold of 16°F or below comes every winter, usually between December 6 and March 10.

July is the warmest month at Zanesville Municipal Airport, OH, averaging 85°F by day and 64°F at night; January is the coldest at 38°F and 22°F. A freezing night is all but certain in every month from October 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 3,402 growing degree days a year (base 50°F), more than at 69% of the 148 Ohio stations. 36% of them (1,228) have built up by the end of June, and July adds the most, 750. Precipitation totals 38.5 inches a year, most in June (4.3") and least in February (2.3"); May to September bring 47% of it.

The nearest other station, Philo 3 SW, OH, 9 miles southeast of Zanesville, has a last frost 7 days earlier (April 19), a first frost 6 days later (October 25), a season 12 days longer.

The first measurable snow (0.1 inch or more) in Zanesville usually arrives around December 2, and the last of the season around March 13. Those are the middle dates across the winters of 1991–2020 at Philo 3 SW, OH, 9 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 44 days after the last snow.

ZIP 43701 is 6 miles from Zanesville Municipal Airport, OH, which stands at 880 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 43701 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.