Frost Dates for 37135 — Nolensville, Tennessee

Half of springs at Smyrna 6S, TN see their last 32°F night by April 13; only one in ten is past it by March 31, and one in ten still has one after May 4. Planting tender crops after April 21 leaves a 30% risk of a frost on them, after April 26 20%, and after May 4 10%. The 21 days between the even-odds date and the one-in-ten date is the widest of the 144 Tennessee stations behind this site's ZIP pages, so a fixed calendar date is a gamble here.

In fall the first 32°F night comes by October 21 in half of years, as early as October 8 one year in ten, and holds off past November 2 one year in ten. A hard freeze of 28°F follows 9 days later, around October 30; in spring the one-in-ten date for 28°F is April 15, 19 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 209 days one year in ten and falls short of 167 one year in ten. On average 102 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 16 days longer, to about April 29, and return around October 12. Severe cold of 16°F or below comes every winter, usually between December 2 and February 28.

July is the warmest month at Smyrna 6S, TN, averaging 90°F by day and 66°F at night; January is the coldest at 48°F and 26°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 14% of years.

Warmth for growing adds up to 4,328 growing degree days a year (base 50°F), fewer than at 64% of the 144 Tennessee stations. 37% of them (1,616) have built up by the end of June, and July adds the most, 859.

The nearest other station, Brentwood, TN, 7 miles northwest of Nolensville and 157 feet higher, has a last frost 2 days later (April 15), a first frost 5 days later (October 26), a season 4 days longer.

The first measurable snow (0.1 inch or more) in Nolensville usually arrives around January 17, and the last of the season around February 27. Those are the middle dates across the winters of 1991–2020 at Smyrna 6S, TN, 6.5 miles away: half of years saw snow earlier, half later. Snow fell in 93% of those winters. The last 32°F night of spring typically comes 45 days after the last snow.

ZIP 37135 is 7 miles from Smyrna 6S, TN, which stands at 550 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 3 other ZIP codes share the station; its figures are presented in full for 37167 (Smyrna). The 2023 USDA Plant Hardiness Zone Map lists ZIP 37135 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.