Frost Dates for 38382 — Trenton, Tennessee

Half of springs at Milan Exp Stn, TN see their last 32°F night by April 4; only one in ten is past it by March 17, and one in ten still has one after April 21. Planting tender crops after April 11 leaves a 30% risk of a frost on them, after April 16 20%, and after April 21 10%. The 17 days between the even-odds date and the one-in-ten date is narrower than at 34% of the 144 Tennessee stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 28 in half of years, as early as October 15 one year in ten, and holds off past November 10 one year in ten. A hard freeze of 28°F follows 9 days later, around November 6; in spring the one-in-ten date for 28°F is April 11, 10 days before the 32°F one. The freeze-free season lasts 206 days in a typical year, longer than at 54% of the 144 Tennessee stations; it reaches 227 days one year in ten and falls short of 184 one year in ten. On average 90 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 11 days longer, to about April 15, and return around October 19. Severe cold of 16°F or below comes in 98% of winters, usually between December 22 and February 13.

July is the warmest month at Milan Exp Stn, TN, averaging 90°F by day and 70°F at night; January is the coldest at 48°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 62% of years.

Warmth for growing adds up to 4,864 growing degree days a year (base 50°F), more than at 87% of the 144 Tennessee stations. 39% of them (1,912) have built up by the end of June, and July adds the most, 927. Precipitation totals 56.2 inches a year, most in May (6.2") and least in August (3.7"); May to September bring 41% of it.

The nearest other station, Alamo 1 N, TN, 15 miles southwest of Trenton, has a last frost 7 days earlier (March 28), a first frost 7 days later (November 4), a season 14 days longer.

The first measurable snow (0.1 inch or more) in Trenton usually arrives around January 7, and the last of the season around February 6. Those are the middle dates across the winters of 1991–2020 at Milan Exp Stn, TN, 12.8 miles away: half of years saw snow earlier, half later. Snow fell in 86% of those winters. The last 32°F night of spring typically comes 57 days after the last snow.

ZIP 38382 is 13 miles from Milan Exp Stn, TN, which stands at 415 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 38358 (Milan). The 2023 USDA Plant Hardiness Zone Map lists ZIP 38382 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.