Frost Dates for 41048 — Hebron, Kentucky

Half of springs at Cincinnati-Fernbank, OH see their last 32°F night by April 13; only one in ten is past it by March 31, and one in ten still has one after May 2. Planting tender crops after April 20 leaves a 30% risk of a frost on them, after April 24 20%, and after May 2 10%. The 19 days between the even-odds date and the one-in-ten date is wider than at 76% of the 113 Kentucky stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 31 in half of years, as early as October 17 one year in ten, and holds off past November 13 one year in ten. A hard freeze of 28°F follows 10 days later, around November 10; in spring the one-in-ten date for 28°F is April 15, 17 days before the 32°F one. The freeze-free season lasts 197 days in a typical year, longer than at 59% of the 113 Kentucky stations; it reaches 219 days one year in ten and falls short of 175 one year in ten. On average 101 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 13 days longer, to about April 26, and return around October 20. Severe cold of 16°F or below comes every winter, usually between December 20 and February 28.

July is the warmest month at Cincinnati-Fernbank, OH, averaging 86°F by day and 67°F at night; January is the coldest at 40°F and 24°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From June to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 85% of years and May still brings one in 12% of years.

Warmth for growing adds up to 3,853 growing degree days a year (base 50°F), fewer than at 59% of the 113 Kentucky stations. 36% of them (1,394) have built up by the end of June, and July adds the most, 809. Precipitation totals 47.6 inches a year, most in May (5.2") and least in February (3.1"); May to September bring 43% of it.

The nearest other station, Cincinnati Northern Ky Airport, KY, 3 miles south of Hebron and 369 feet higher, has a last frost 5 days later (April 18), a first frost 6 days earlier (October 25), a season 9 days shorter.

The first measurable snow (0.1 inch or more) in Hebron usually arrives around December 19, and the last of the season around March 10. Those are the middle dates across the winters of 1991–2020 at Cincinnati-Fernbank, OH, 2.6 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 41048 is 3 miles from Cincinnati-Fernbank, OH, which stands at 500 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 3 other ZIP codes share the station; its figures are presented in full for 47025 (Lawrenceburg). The 2023 USDA Plant Hardiness Zone Map lists ZIP 41048 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.