Frost Dates for 37047 — Cornersville, Tennessee

Half of springs at Lewisburg Exp Stn, TN see their last 32°F night by April 14; only one in ten is past it by March 31, and one in ten still has one after April 30. Planting tender crops after April 22 leaves a 30% risk of a frost on them, after April 26 20%, and after April 30 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 22 in half of years, as early as October 9 one year in ten, and holds off past November 5 one year in ten. A hard freeze of 28°F follows 11 days later, around November 2; in spring the one-in-ten date for 28°F is April 20, 10 days before the 32°F one. The freeze-free season lasts 192 days in a typical year, shorter than at 77% of the 144 Tennessee stations; it reaches 213 days one year in ten and falls short of 169 one year in ten. On average 95 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 26, and return around October 13. Severe cold of 16°F or below comes in 99% of winters, usually between December 13 and February 22.

July is the warmest month at Lewisburg Exp Stn, TN, averaging 91°F by day and 67°F at night; January is the coldest at 49°F and 28°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 86% of years.

Warmth for growing adds up to 4,591 growing degree days a year (base 50°F), more than at 65% of the 144 Tennessee stations. 38% of them (1,752) have built up by the end of June, and July adds the most, 893. Precipitation totals 56.1 inches a year, most in December (5.7") and least in October (3.7"); May to September bring 41% of it.

The nearest other station, Pulaski Wwtp, TN, 15 miles southwest of Cornersville, has the same 50% last-frost date, a first frost 2 days later (October 24), a season 1 day longer.

The first measurable snow (0.1 inch or more) in Cornersville usually arrives around January 21, and the last of the season around February 10. Those are the middle dates across the winters of 1991–2020 at Lewisburg Exp Stn, TN, 6 miles away: half of years saw snow earlier, half later. Snow fell in 64% of those winters. The last 32°F night of spring typically comes 63 days after the last snow.

ZIP 37047 is 6 miles from Lewisburg Exp Stn, TN, which stands at 787 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 3 other ZIP codes share the station; its figures are presented in full for 37091 (Lewisburg). The 2023 USDA Plant Hardiness Zone Map lists ZIP 37047 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.