Frost Dates for 43001 — Alexandria, Ohio

Half of springs at Newark Heath Airport, OH see their last 32°F night by April 22; only one in ten is past it by April 6, and one in ten still has one after May 10. Planting tender crops after April 29 leaves a 30% risk of a frost on them, after May 4 20%, and after May 10 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 18 in half of years, as early as October 5 one year in ten, and holds off past November 1 one year in ten. A hard freeze of 28°F follows 13 days later, around October 31; in spring the one-in-ten date for 28°F is April 25, 15 days before the 32°F one. The freeze-free season lasts 178 days in a typical year, shorter than at 54% of the 148 Ohio stations; it reaches 198 days one year in ten and falls short of 157 one year in ten. On average 122 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 May 3, and return around October 7. Severe cold of 16°F or below comes every winter, usually between December 8 and March 7.

July is the warmest month at Newark Heath Airport, OH, averaging 86°F by day and 63°F at night; January is the coldest at 39°F and 21°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 26% of years.

Warmth for growing adds up to 3,470 growing degree days a year (base 50°F), more than at 77% of the 148 Ohio stations. 37% of them (1,281) have built up by the end of June, and July adds the most, 766. Precipitation totals 38.8 inches a year, most in May (4.1") and least in February (2.2"); May to September bring 47% of it.

The nearest other station, Newark Wtr Wks, OH, 11 miles east of Alexandria, has a last frost 7 days later (April 29), a first frost 2 days earlier (October 16), a season 11 days shorter.

The first measurable snow (0.1 inch or more) in Alexandria usually arrives around December 5, and the last of the season around March 23. Those are the middle dates across the winters of 1991–2020 at Utica 4 WSW, OH, 9.3 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 30 days after the last snow.

ZIP 43001 is 9 miles from Newark Heath Airport, OH, which stands at 884 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 6 other ZIP codes share the station; its figures are presented in full for 43023 (Granville). The 2023 USDA Plant Hardiness Zone Map lists ZIP 43001 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.