Frost Dates for 37357 — Morrison, Tennessee

Half of springs at Mc Minnville, TN see their last 32°F night by April 7; only one in ten is past it by March 20, and one in ten still has one after April 23. Planting tender crops after April 14 leaves a 30% risk of a frost on them, after April 18 20%, and after April 23 10%. The 16 days between the even-odds date and the one-in-ten date is narrower than at 53% 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 16 one year in ten, and holds off past November 10 one year in ten. A hard freeze of 28°F follows 8 days later, around November 7; in spring the one-in-ten date for 28°F is April 13, 10 days before the 32°F one. The freeze-free season lasts 203 days in a typical year, shorter than at 52% of the 144 Tennessee stations; it reaches 227 days one year in ten and falls short of 182 one year in ten. On average 69 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 19, and return around October 20. Severe cold of 16°F or below comes in 96% of winters, usually between December 27 and February 9.

July is the warmest month at Mc Minnville, TN, averaging 89°F by day and 68°F at night; January is the coldest at 51°F and 31°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 69% of years.

Warmth for growing adds up to 4,782 growing degree days a year (base 50°F), more than at 84% of the 144 Tennessee stations. 40% of them (1,891) have built up by the end of June, and July adds the most, 874. Precipitation totals 54.3 inches a year, most in December (5.5") and least in October (3.2"); May to September bring 40% of it.

The nearest other station, Manchester #2, TN, 11 miles southwest of Morrison, has a last frost 6 days later (April 13), a first frost 6 days earlier (October 24), a season 11 days shorter.

The first measurable snow (0.1 inch or more) in Morrison usually arrives around January 7, and the last of the season around February 17. Those are the middle dates across the winters of 1991–2020 at Mc Minnville, TN, 9.5 miles away: half of years saw snow earlier, half later. Snow fell in 95% of those winters. The last 32°F night of spring typically comes 49 days after the last snow.

ZIP 37357 is 10 miles from Mc Minnville, TN, which stands at 940 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 37110 (Mcminnville). The 2023 USDA Plant Hardiness Zone Map lists ZIP 37357 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.