Frost Dates for 37066 — Gallatin, Tennessee

Half of springs at Bethpage 1 S, TN see their last 32°F night by April 16; 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 22 leaves a 30% risk of a frost on them, after April 27 20%, and after May 2 10%. The 16 days between the even-odds date and the one-in-ten date is narrower than at 53% of the 144 Tennessee 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 10 one year in ten, and holds off past November 4 one year in ten. A hard freeze of 28°F follows 8 days later, around October 31; in spring the one-in-ten date for 28°F is April 20, 12 days before the 32°F one. The freeze-free season lasts 189 days in a typical year, shorter than at 83% of the 144 Tennessee stations; it reaches 210 days one year in ten and falls short of 170 one year in ten. On average 101 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 28, and return around October 15. Severe cold of 16°F or below comes every winter, usually between December 8 and February 26.

July is the warmest month at Bethpage 1 S, TN, averaging 88°F by day and 67°F at night; January is the coldest at 45°F and 25°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 89% of years and May still brings one in 12% of years.

Warmth for growing adds up to 4,093 growing degree days a year (base 50°F), fewer than at 77% of the 144 Tennessee stations. 37% of them (1,515) have built up by the end of June, and July adds the most, 842. Precipitation totals 54.9 inches a year, most in May (5.7") and least in September (3.7"); May to September bring 42% of it.

The nearest other station, White House, TN, 11 miles west of Gallatin and 260 feet higher, has a last frost 9 days earlier (April 7), a first frost 7 days later (October 30), a season 17 days longer.

Measurable snow is rare here: only 13 of 28 winters from 1991 to 2020 recorded 0.1 inch or more at Old Hickory Dam, TN, 13 miles away, so there is no typical first-snow date to plan around.

ZIP 37066 is 9 miles from Bethpage 1 S, TN, which stands at 560 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 3 other ZIP codes share the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 37066 in zone 7b, the band where the coldest night of the year averaged 5 to 10°F (-15.0 to -12.2°C) over 1991–2020; a zone describes winter lows, not frost dates.