Frost Dates for 37338 — Graysville, Tennessee

Half of springs at Pikeville, TN see their last 32°F night by April 11; only one in ten is past it by March 24, and one in ten still has one after April 28. Planting tender crops after April 17 leaves a 30% risk of a frost on them, after April 21 20%, and after April 28 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 25 in half of years, as early as October 12 one year in ten, and holds off past November 5 one year in ten. A hard freeze of 28°F follows 9 days later, around November 3; in spring the one-in-ten date for 28°F is April 14, 14 days before the 32°F one. The freeze-free season lasts 197 days in a typical year, shorter than at 67% of the 144 Tennessee stations; it reaches 218 days one year in ten and falls short of 175 one year in ten. On average 76 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 23, and return around October 16. Severe cold of 16°F or below comes in 98% of winters, usually between December 21 and February 15.

July is the warmest month at Pikeville, TN, averaging 88°F by day and 67°F at night; January is the coldest at 49°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 76% of years.

Warmth for growing adds up to 4,513 growing degree days a year (base 50°F), more than at 57% of the 144 Tennessee stations. 39% of them (1,740) have built up by the end of June, and July adds the most, 856. Precipitation totals 56.3 inches a year, most in December (5.4") and least in October (3.5"); May to September bring 40% of it.

The nearest other station, Dayton 2SE, TN, 11 miles east of Graysville, has a last frost 7 days earlier (April 4), a first frost 6 days later (October 31), a season 11 days longer.

The first measurable snow (0.1 inch or more) in Graysville usually arrives around January 6, and the last of the season around February 18. Those are the middle dates across the winters of 1991–2020 at Pikeville, TN, 10.7 miles away: half of years saw snow earlier, half later. Snow fell in 97% of those winters. The last 32°F night of spring typically comes 52 days after the last snow.

ZIP 37338 is 11 miles from Pikeville, TN, which stands at 864 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 37367 (Pikeville). The 2023 USDA Plant Hardiness Zone Map lists ZIP 37338 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.