Frost Dates for 40119 — Falls Of Rough, Kentucky

Half of springs at Rough Rvr Lake, KY see their last 32°F night by April 17; only one in ten is past it by March 31, and one in ten still has one after May 5. Planting tender crops after April 25 leaves a 30% risk of a frost on them, after April 30 20%, and after May 5 10%. The 18 days between the even-odds date and the one-in-ten date is wider than at 54% of the 113 Kentucky stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 23 in half of years, as early as October 8 one year in ten, and holds off past November 3 one year in ten. A hard freeze of 28°F follows 9 days later, around November 1; in spring the one-in-ten date for 28°F is April 23, 12 days before the 32°F one. The freeze-free season lasts 187 days in a typical year, shorter than at 72% of the 113 Kentucky stations; it reaches 207 days one year in ten and falls short of 165 one year in ten. On average 117 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 29, and return around October 13. Severe cold of 16°F or below comes every winter, usually between December 7 and February 28.

July is the warmest month at Rough Rvr Lake, KY, averaging 90°F by day and 65°F at night; January is the coldest at 44°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 87% of years and May still brings one in 18% of years.

Warmth for growing adds up to 4,235 growing degree days a year (base 50°F), more than at 69% of the 113 Kentucky stations. 37% of them (1,574) have built up by the end of June, and July adds the most, 862. Precipitation totals 51.6 inches a year, most in May (6.0") and least in August (3.2"); May to September bring 42% of it.

The nearest other station, Mcdaniels, KY, 6 miles northeast of Falls Of Rough, has a last frost 6 days earlier (April 11), a first frost 3 days later (October 26), a season 9 days longer.

The first measurable snow (0.1 inch or more) in Falls Of Rough usually arrives around December 29, and the last of the season around February 24. Those are the middle dates across the winters of 1991–2020 at Rough Rvr Lake, KY, 1.8 miles away: half of years saw snow earlier, half later. Snow fell in 89% of those winters. The last 32°F night of spring typically comes 52 days after the last snow.

ZIP 40119 is 2 miles from Rough Rvr Lake, KY, which stands at 560 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 40119 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.