Frost Dates for 37763 — Kingston, Tennessee

Half of springs at Kingston, TN see their last 32°F night by April 3; only one in ten is past it by March 16, and one in ten still has one after April 20. Planting tender crops after April 9 leaves a 30% risk of a frost on them, after April 14 20%, and after April 20 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 November 4 in half of years, as early as October 23 one year in ten, and holds off past November 18 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 5, 15 days before the 32°F one. The freeze-free season lasts 215 days in a typical year, longer than at 81% of the 144 Tennessee stations; it reaches 236 days one year in ten and falls short of 194 one year in ten. On average 78 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 14 days longer, to about April 17, and return around October 26. Severe cold of 16°F or below comes in 93% of winters, usually between January 1 and February 7.

July is the warmest month at Kingston, TN, averaging 88°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 57% of years.

Warmth for growing adds up to 4,414 growing degree days a year (base 50°F), fewer than at 56% of the 144 Tennessee stations. 37% of them (1,655) have built up by the end of June, and July adds the most, 863. Precipitation totals 59.0 inches a year, most in December (6.1") and least in October (3.2"); May to September bring 39% of it.

The nearest other station, Rockwood 2, TN, 10 miles west of Kingston, has a last frost 5 days later (April 8), a first frost 4 days earlier (October 31), a season 12 days shorter.

The first measurable snow (0.1 inch or more) in Kingston usually arrives around January 17, and the last of the season around February 4. Those are the middle dates across the winters of 1991–2020 at Decatur 7NE, TN, 16.5 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 58 days after the last snow.

ZIP 37763 is 2 miles from Kingston, TN, which stands at 814 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station; its figures are presented in full for 37748 (Harriman). The 2023 USDA Plant Hardiness Zone Map lists ZIP 37763 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.