Frost Dates for 42141 — Glasgow, Kentucky

Half of springs at Glasgow, KY see their last 32°F night by April 9; only one in ten is past it by March 24, and one in ten still has one after April 28. Planting tender crops after April 17 leaves a 30% risk of a frost on them, after April 21 20%, and after April 28 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 27 in half of years, as early as October 14 one year in ten, and holds off past November 11 one year in ten. A hard freeze of 28°F follows 9 days later, around November 5; in spring the one-in-ten date for 28°F is April 13, 15 days before the 32°F one. The freeze-free season lasts 201 days in a typical year, longer than at 67% of the 113 Kentucky stations; it reaches 222 days one year in ten and falls short of 179 one year in ten. On average 80 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 14 days longer, to about April 23, and return around October 19. Severe cold of 16°F or below comes in 99% of winters, usually between December 21 and February 15.

July is the warmest month at Glasgow, KY, averaging 90°F by day and 68°F at night; January is the coldest at 47°F and 29°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 73% of years.

Warmth for growing adds up to 4,756 growing degree days a year (base 50°F), more than at 96% of the 113 Kentucky stations. 39% of them (1,851) have built up by the end of June, and July adds the most, 902. Precipitation totals 54.9 inches a year, most in May (5.8") and least in August (3.4"); May to September bring 42% of it.

The nearest other station, Knob Lick 4S, KY, 12 miles east of Glasgow and 250 feet higher, has a last frost 4 days earlier (April 5), a first frost 6 days later (November 2), a season 10 days longer.

The first measurable snow (0.1 inch or more) in Glasgow usually arrives around December 23, and the last of the season around February 9. Those are the middle dates across the winters of 1991–2020 at Glasgow, KY, 2.1 miles away: half of years saw snow earlier, half later. Snow fell in 88% of those winters. The last 32°F night of spring typically comes 59 days after the last snow.

ZIP 42141 is 2 miles from Glasgow, KY, which stands at 770 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 42141 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.