Frost Dates for 41042 — Florence, Kentucky

Half of springs at Cincinnati Northern Ky Airport, KY see their last 32°F night by April 18; only one in ten is past it by April 3, and one in ten still has one after May 7. Planting tender crops after April 26 leaves a 30% risk of a frost on them, after April 30 20%, and after May 7 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 25 in half of years, as early as October 12 one year in ten, and holds off past November 5 one year in ten. A hard freeze of 28°F follows 9 days later, around November 3; in spring the one-in-ten date for 28°F is April 23, 14 days before the 32°F one. The freeze-free season lasts 188 days in a typical year, shorter than at 67% of the 113 Kentucky stations; it reaches 209 days one year in ten and falls short of 166 one year in ten. On average 100 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 April 30, and return around October 15. Severe cold of 16°F or below comes every winter, usually between December 8 and March 4.

July is the warmest month at Cincinnati Northern Ky Airport, KY, averaging 86°F by day and 66°F at night; January is the coldest at 40°F and 23°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 20% of years.

Warmth for growing adds up to 3,814 growing degree days a year (base 50°F), fewer than at 64% of the 113 Kentucky stations. 37% of them (1,393) have built up by the end of June, and July adds the most, 804. Precipitation totals 45.3 inches a year, most in June (4.8") and least in September (3.1"); May to September bring 44% of it.

The nearest other station, Cincinnati-Fernbank, OH, 10 miles north of Florence and 369 feet lower, has a last frost 5 days earlier (April 13), a first frost 6 days later (October 31), a season 9 days longer.

The first measurable snow (0.1 inch or more) in Florence usually arrives around November 29, and the last of the season around March 21. Those are the middle dates across the winters of 1991–2020 at Cincinnati Northern Ky Airport, KY, 4.4 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 28 days after the last snow.

ZIP 41042 is 4 miles from Cincinnati Northern Ky Airport, KY, which stands at 869 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 6 other ZIP codes share the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 41042 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.