Frost Dates for 38310 — Adamsville, Tennessee

Half of springs at Savannah 6 SW, TN see their last 32°F night by March 31; only one in ten is past it by March 13, and one in ten still has one after April 15. Planting tender crops after April 6 leaves a 30% risk of a frost on them, after April 10 20%, and after April 15 10%. The 15 days between the even-odds date and the one-in-ten date is narrower than at 78% of the 144 Tennessee stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 1 in half of years, as early as October 18 one year in ten, and holds off past November 16 one year in ten. A hard freeze of 28°F follows 10 days later, around November 11; in spring the one-in-ten date for 28°F is April 5, 10 days before the 32°F one. The freeze-free season lasts 212 days in a typical year, longer than at 76% of the 144 Tennessee stations; it reaches 236 days one year in ten and falls short of 192 one year in ten. On average 72 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 12, and return around October 23. Severe cold of 16°F or below comes in 94% of winters, usually between December 30 and February 5.

July is the warmest month at Savannah 6 SW, TN, averaging 91°F by day and 70°F at night; January is the coldest at 51°F and 30°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 5,231 growing degree days a year (base 50°F), more than at 98% of the 144 Tennessee stations. 39% of them (2,057) have built up by the end of June, and July adds the most, 952. Precipitation totals 59.2 inches a year, most in May (6.2") and least in October (3.9"); May to September bring 40% of it.

The nearest other station, Selmer, TN, 13 miles southwest of Adamsville, has a last frost 6 days later (April 6), a first frost 2 days earlier (October 30), a season 6 days shorter.

The first measurable snow (0.1 inch or more) in Adamsville usually arrives around February 4, and the last of the season around February 10. Those are the middle dates across the winters of 1991–2020 at Savannah 6 SW, TN, 7.1 miles away: half of years saw snow earlier, half later. Snow fell in 56% of those winters. The last 32°F night of spring typically comes 49 days after the last snow.

ZIP 38310 is 7 miles from Savannah 6 SW, TN, which stands at 420 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 38372 (Savannah). The 2023 USDA Plant Hardiness Zone Map lists ZIP 38310 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.