Frost Dates for 40014 — Crestwood, Kentucky

Half of springs at Crestwood 4NE, KY see their last 32°F night by April 12; only one in ten is past it by March 29, and one in ten still has one after May 1. Planting tender crops after April 20 leaves a 30% risk of a frost on them, after April 25 20%, and after May 1 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 11 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 17, 14 days before the 32°F one. The freeze-free season lasts 193 days in a typical year, longer than at 50% of the 113 Kentucky stations; it reaches 213 days one year in ten and falls short of 170 one year in ten. On average 105 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 24, and return around October 15. Severe cold of 16°F or below comes every winter, usually between December 8 and February 28.

July is the warmest month at Crestwood 4NE, KY, averaging 88°F by day and 65°F at night; January is the coldest at 41°F and 23°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 84% of years and May still brings one in 10% of years.

Warmth for growing adds up to 3,944 growing degree days a year (base 50°F), fewer than at 52% of the 113 Kentucky stations. 38% of them (1,499) have built up by the end of June, and July adds the most, 820. Precipitation totals 53.0 inches a year, most in May (5.9") and least in September (3.6"); May to September bring 44% of it.

The nearest other station, Louisville Bowman Field, KY, 13 miles southwest of Crestwood and 240 feet lower, has a last frost 9 days earlier (April 3), a first frost 9 days later (November 3), a season 21 days longer.

The first measurable snow (0.1 inch or more) in Crestwood usually arrives around December 7, and the last of the season around March 13. Those are the middle dates across the winters of 1991–2020 at Louisville WFO, KY, 18.3 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 40014 is 3 miles from Crestwood 4NE, KY, which stands at 780 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 7 other ZIP codes share the station; its figures are presented in full for 40245 (Louisville). The 2023 USDA Plant Hardiness Zone Map lists ZIP 40014 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.