Frost Dates for 37076 — Hermitage, Tennessee

Half of springs at Old Hickory WFO, TN see their last 32°F night by April 1; only one in ten is past it by March 17, and one in ten still has one after April 17. Planting tender crops after April 7 leaves a 30% risk of a frost on them, after April 10 20%, and after April 17 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 November 4 in half of years, as early as October 23 one year in ten, and holds off past November 20 one year in ten. A hard freeze of 28°F follows 11 days later, around November 15; in spring the one-in-ten date for 28°F is April 6, 11 days before the 32°F one. The freeze-free season lasts 216 days in a typical year, longer than at 83% of the 144 Tennessee stations; it reaches 239 days one year in ten and falls short of 198 one year in ten. On average 69 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 13, and return around October 26. Severe cold of 16°F or below comes in 98% of winters, usually between December 28 and February 13.

July is the warmest month at Old Hickory WFO, TN, averaging 89°F by day and 68°F at night; January is the coldest at 46°F and 28°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 50% of years.

Warmth for growing adds up to 4,558 growing degree days a year (base 50°F), more than at 63% of the 144 Tennessee stations. 38% of them (1,718) have built up by the end of June, and July adds the most, 882. Precipitation totals 54.7 inches a year, most in May (5.4") and least in October (3.5"); May to September bring 43% of it.

The nearest other station, Nashville Berry Field, TN, 6 miles southwest of Hermitage, has a last frost 3 days later (April 4), a first frost 4 days earlier (October 31), a season 7 days shorter.

The first measurable snow (0.1 inch or more) in Hermitage usually arrives around January 8, and the last of the season around February 25. Those are the middle dates across the winters of 1991–2020 at Old Hickory WFO, TN, 5.1 miles away: half of years saw snow earlier, half later. Snow fell in 96% of those winters. The last 32°F night of spring typically comes 35 days after the last snow.

ZIP 37076 is 5 miles from Old Hickory WFO, TN, which stands at 590 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station; its figures are presented in full for 37122 (Mount Juliet). The 2023 USDA Plant Hardiness Zone Map lists ZIP 37076 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.