Frost Dates for 37388 — Tullahoma, Tennessee

Half of springs at Tullahoma, TN see their last 32°F night by April 6; only one in ten is past it by March 21, and one in ten still has one after April 23. Planting tender crops after April 13 leaves a 30% risk of a frost on them, after April 18 20%, and after April 23 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 30 in half of years, as early as October 18 one year in ten, and holds off past November 12 one year in ten. A hard freeze of 28°F follows 9 days later, around November 8; in spring the one-in-ten date for 28°F is April 11, 12 days before the 32°F one. The freeze-free season lasts 207 days in a typical year, longer than at 59% of the 144 Tennessee stations; it reaches 229 days one year in ten and falls short of 187 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 19, and return around October 21. Severe cold of 16°F or below comes in 98% of winters, usually between December 24 and February 10.

July is the warmest month at Tullahoma, TN, averaging 87°F by day and 68°F at night; January is the coldest at 48°F and 29°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 68% of years.

Warmth for growing adds up to 4,420 growing degree days a year (base 50°F), fewer than at 54% of the 144 Tennessee stations. 38% of them (1,685) have built up by the end of June, and July adds the most, 854. Precipitation totals 60.7 inches a year, most in December (6.4") and least in October (3.8"); May to September bring 38% of it.

The nearest other station, Lynchburg, TN, 9 miles southwest of Tullahoma and 212 feet lower, has a last frost 9 days later (April 15), a first frost 5 days earlier (October 25), a season 15 days shorter.

The first measurable snow (0.1 inch or more) in Tullahoma usually arrives around January 13, and the last of the season around February 12. Those are the middle dates across the winters of 1991–2020 at Tullahoma, TN, 0.9 miles away: half of years saw snow earlier, half later. Snow fell in 89% of those winters. The last 32°F night of spring typically comes 53 days after the last snow.

ZIP 37388 is under a mile from Tullahoma, TN, which stands at 1,022 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 37388 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.