Frost Dates for 42210 — Brownsville, Kentucky

Half of springs at Bowling Green 21 NNE, KY see their last 32°F night by April 4; only one in ten is past it by March 19, and one in ten still has one after April 24. Planting tender crops after April 11 leaves a 30% risk of a frost on them, after April 17 20%, and after April 24 10%. The 20 days between the even-odds date and the one-in-ten date is wider than at 88% of the 113 Kentucky stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 31 in half of years, as early as October 18 one year in ten, and holds off past November 15 one year in ten. A hard freeze of 28°F follows 11 days later, around November 11; in spring the one-in-ten date for 28°F is April 9, 15 days before the 32°F one. The freeze-free season lasts 209 days in a typical year, longer than at 86% of the 113 Kentucky stations; it reaches 230 days one year in ten and falls short of 186 one year in ten. On average 75 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 18, and return around October 22. Severe cold of 16°F or below comes in 99% of winters, usually between December 20 and February 15.

July is the warmest month at Bowling Green 21 NNE, KY, averaging 86°F by day and 67°F at night; January is the coldest at 44°F and 27°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 60% of years.

Warmth for growing adds up to 4,292 growing degree days a year (base 50°F), more than at 73% of the 113 Kentucky stations. 39% of them (1,657) have built up by the end of June, and July adds the most, 820. Precipitation totals 53.2 inches a year, most in May (5.5") and least in August (3.1"); May to September bring 40% of it.

The nearest other station, Mammoth Cave, KY, 10 miles southeast of Brownsville, has a last frost 5 days later (April 9), a first frost 1 day earlier (October 30), a season 5 days shorter.

The first measurable snow (0.1 inch or more) in Brownsville usually arrives around January 14, and the last of the season around February 16. Those are the middle dates across the winters of 1991–2020 at Nolin Rvr Lake, KY, 5.1 miles away: half of years saw snow earlier, half later. Snow fell in 95% of those winters. The last 32°F night of spring typically comes 47 days after the last snow.

ZIP 42210 is 4 miles from Bowling Green 21 NNE, KY, which stands at 790 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 42210 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.