Frost Dates for 42743 — Greensburg, Kentucky

Half of springs at Greensburg, KY see their last 32°F night by April 15; 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 21 leaves a 30% risk of a frost on them, after April 26 20%, and after May 2 10%. The 17 days between the even-odds date and the one-in-ten date is narrower than at 47% of the 113 Kentucky stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 24 in half of years, as early as October 11 one year in ten, and holds off past November 6 one year in ten. A hard freeze of 28°F follows 11 days later, around November 4; in spring the one-in-ten date for 28°F is April 18, 14 days before the 32°F one. The freeze-free season lasts 192 days in a typical year, shorter than at 50% of the 113 Kentucky stations; it reaches 212 days one year in ten and falls short of 171 one year in ten. On average 103 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 April 26, and return around October 15. Severe cold of 16°F or below comes every winter, usually between December 14 and February 25.

July is the warmest month at Greensburg, KY, averaging 88°F by day and 67°F at night; January is the coldest at 45°F and 26°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 86% of years and May still brings one in 13% of years.

Warmth for growing adds up to 4,184 growing degree days a year (base 50°F), more than at 64% of the 113 Kentucky stations. 37% of them (1,562) have built up by the end of June, and July adds the most, 854. Precipitation totals 51.7 inches a year, most in May (5.1") and least in August (3.2"); May to September bring 42% of it.

The nearest other station, Knob Lick 4S, KY, 18 miles southwest of Greensburg and 435 feet higher, has a last frost 10 days earlier (April 5), a first frost 9 days later (November 2), a season 19 days longer.

The first measurable snow (0.1 inch or more) in Greensburg usually arrives around December 12, and the last of the season around March 12. Those are the middle dates across the winters of 1991–2020 at Bradfordsville, KY, 26.8 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 42743 is 2 miles from Greensburg, KY, which stands at 585 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station; its figures are presented in full for 42718 (Campbellsville). The 2023 USDA Plant Hardiness Zone Map lists ZIP 42743 in zone 7a, the band where the coldest night of the year averaged 0 to 5°F (-17.8 to -15.0°C) over 1991–2020; a zone describes winter lows, not frost dates.