Frost Dates for 43780 — Senecaville, Ohio

Half of springs at Cambridge, OH see their last 32°F night by April 28; only one in ten is past it by April 13, 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 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 17 in half of years, as early as October 3 one year in ten, and holds off past October 28 one year in ten. A hard freeze of 28°F follows 11 days later, around October 28; in spring the one-in-ten date for 28°F is April 30, 15 days before the 32°F one. The freeze-free season lasts 172 days in a typical year, shorter than at 77% of the 148 Ohio stations; it reaches 192 days one year in ten and falls short of 151 one year in ten. On average 111 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 10, and return around October 6. Severe cold of 16°F or below comes every winter, usually between December 2 and March 11.

July is the warmest month at Cambridge, OH, averaging 85°F by day and 63°F at night; January is the coldest at 38°F and 21°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 40% of years.

Warmth for growing adds up to 3,372 growing degree days a year (base 50°F), more than at 67% of the 148 Ohio stations. 37% of them (1,233) have built up by the end of June, and July adds the most, 741. Precipitation totals 41.4 inches a year, most in June (4.5") and least in February (2.4"); May to September bring 48% of it.

The nearest other station, Barnesville, OH, 14 miles east of Senecaville and 480 feet higher, has a last frost 1 day earlier (April 27), a first frost 5 days later (October 22), a season 5 days longer.

The first measurable snow (0.1 inch or more) in Senecaville usually arrives around December 20, and the last of the season around March 10. Those are the middle dates across the winters of 1991–2020 at Cambridge, OH, 9.2 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 49 days after the last snow.

ZIP 43780 is 9 miles from Cambridge, OH, which stands at 800 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 43725 (Cambridge). The 2023 USDA Plant Hardiness Zone Map lists ZIP 43780 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.