Frost Dates for 37886 — Walland, Tennessee

Half of springs at Townsend 5S, TN see their last 32°F night by April 20; only one in ten is past it by April 1, and one in ten still has one after May 10. Planting tender crops after April 29 leaves a 30% risk of a frost on them, after May 3 20%, and after May 10 10%. The 20 days between the even-odds date and the one-in-ten date is wider than at 95% of the 144 Tennessee stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 22 in half of years, as early as October 9 one year in ten, and holds off past November 4 one year in ten. A hard freeze of 28°F follows 10 days later, around November 1; in spring the one-in-ten date for 28°F is April 23, 17 days before the 32°F one. The freeze-free season lasts 185 days in a typical year, shorter than at 89% of the 144 Tennessee stations; it reaches 208 days one year in ten and falls short of 163 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 13 days longer, to about May 3, and return around October 13. Severe cold of 16°F or below comes every winter, usually between December 12 and February 23.

July is the warmest month at Townsend 5S, TN, averaging 82°F by day and 63°F at night; January is the coldest at 47°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 26% of years.

Warmth for growing adds up to 3,448 growing degree days a year (base 50°F), fewer than at 97% of the 144 Tennessee stations. 38% of them (1,304) have built up by the end of June, and July adds the most, 685. Precipitation totals 60.4 inches a year, most in July (6.1") and least in October (3.3"); May to September bring 43% of it.

The nearest other station, Knoxville Mcghee Tyson Airport, TN, 11 miles northwest of Walland and 931 feet lower, has a last frost 19 days earlier (April 1), a first frost 11 days later (November 2), a season 30 days longer.

The first measurable snow (0.1 inch or more) in Walland usually arrives around December 20, and the last of the season around March 2. Those are the middle dates across the winters of 1991–2020 at Townsend 5S, TN, 9.4 miles away: half of years saw snow earlier, half later. Every one of those winters saw snow. The last 32°F night of spring typically comes 49 days after the last snow.

ZIP 37886 is 9 miles from Townsend 5S, TN, which stands at 1,893 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 37886 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.