Frost Dates for 38066 — Rossville, Tennessee

Half of springs at Moscow, TN see their last 32°F night by March 29; only one in ten is past it by March 9, and one in ten still has one after April 16. Planting tender crops after April 5 leaves a 30% risk of a frost on them, after April 9 20%, and after April 16 10%. The 18 days between the even-odds date and the one-in-ten date is wider than at 67% of the 144 Tennessee stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 3 in half of years, as early as October 21 one year in ten, and holds off past November 20 one year in ten. A hard freeze of 28°F follows 10 days later, around November 13; in spring the one-in-ten date for 28°F is April 5, 11 days before the 32°F one. The freeze-free season lasts 219 days in a typical year, longer than at 88% of the 144 Tennessee stations; it reaches 242 days one year in ten and falls short of 196 one year in ten. On average 66 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 10 days longer, to about April 8, and return around October 24. Severe cold of 16°F or below comes in 92% of winters, usually between January 1 and February 5.

July is the warmest month at Moscow, TN, averaging 90°F by day and 71°F at night; January is the coldest at 51°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 43% of years.

Warmth for growing adds up to 5,127 growing degree days a year (base 50°F), more than at 93% of the 144 Tennessee stations. 39% of them (2,011) have built up by the end of June, and July adds the most, 949. Precipitation totals 54.9 inches a year, most in May (5.6") and least in September (3.8"); May to September bring 41% of it.

The nearest other station, Collierville, TN, 7 miles west of Rossville, has the same 50% last-frost date, the same first-frost date, a season 1 day longer.

The first measurable snow (0.1 inch or more) in Rossville usually arrives around January 28, and the last of the season around February 7. Those are the middle dates across the winters of 1991–2020 at Germantown 4SE, TN, 11.9 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 50 days after the last snow.

ZIP 38066 is 7 miles from Moscow, TN, which stands at 335 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station; its figures are presented in full for 38060 (Oakland). The 2023 USDA Plant Hardiness Zone Map lists ZIP 38066 in zone 8a, the band where the coldest night of the year averaged 10 to 15°F (-12.2 to -9.4°C) over 1991–2020; a zone describes winter lows, not frost dates.