Frost Dates for 37079 — Indian Mound, Tennessee

Half of springs at Dover 1 W, 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 10 leaves a 30% risk of a frost on them, after April 15 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 31 in half of years, as early as October 18 one year in ten, and holds off past November 15 one year in ten. A hard freeze of 28°F follows 11 days later, around November 11; in spring the one-in-ten date for 28°F is April 9, 12 days before the 32°F one. The freeze-free season lasts 210 days in a typical year, longer than at 69% of the 144 Tennessee stations; it reaches 232 days one year in ten and falls short of 190 one year in ten. On average 79 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 April 17, and return around October 22. Severe cold of 16°F or below comes in 98% of winters, usually between December 24 and February 11.

July is the warmest month at Dover 1 W, TN, averaging 88°F by day and 69°F at night; January is the coldest at 46°F and 27°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 4,553 growing degree days a year (base 50°F), more than at 62% of the 144 Tennessee stations. 38% of them (1,747) have built up by the end of June, and July adds the most, 880. Precipitation totals 54.8 inches a year, most in May (6.0") and least in September (3.6"); May to September bring 41% of it.

The nearest other station, Tennessee Ridge, TN, 13 miles southwest of Indian Mound and 247 feet higher, has a last frost 3 days later (April 7), a first frost 3 days later (November 3), a season 1 day longer.

The first measurable snow (0.1 inch or more) in Indian Mound usually arrives around January 22, and the last of the season around February 11. Those are the middle dates across the winters of 1991–2020 at Dover 1 W, TN, 11.1 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 52 days after the last snow.

ZIP 37079 is 11 miles from Dover 1 W, TN, which stands at 475 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 37058 (Dover). The 2023 USDA Plant Hardiness Zone Map lists ZIP 37079 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.