Frost Dates for 37150 — Red Boiling Springs, Tennessee

Half of springs at Lafayette, TN see their last 32°F night by April 3; only one in ten is past it by March 18, and one in ten still has one after April 21. Planting tender crops after April 9 leaves a 30% risk of a frost on them, after April 14 20%, and after April 21 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 1 in half of years, as early as October 20 one year in ten, and holds off past November 16 one year in ten. A hard freeze of 28°F follows 10 days later, around November 11; in spring the one-in-ten date for 28°F is April 7, 14 days before the 32°F one. The freeze-free season lasts 213 days in a typical year, longer than at 78% of the 144 Tennessee stations; it reaches 236 days one year in ten and falls short of 190 one year in ten. On average 75 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 15, and return around October 23. Severe cold of 16°F or below comes every winter, usually between December 22 and February 19.

July is the warmest month at Lafayette, TN, averaging 88°F by day and 69°F at night; January is the coldest at 45°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 56% of years.

Warmth for growing adds up to 4,542 growing degree days a year (base 50°F), more than at 59% of the 144 Tennessee stations. 38% of them (1,730) have built up by the end of June, and July adds the most, 885.

The nearest other station, Gainesboro, TN, 15 miles southeast of Red Boiling Springs and 488 feet lower, has a last frost 17 days later (April 20), a first frost 10 days earlier (October 22), a season 30 days shorter.

The first measurable snow (0.1 inch or more) in Red Boiling Springs usually arrives around January 10, and the last of the season around February 11. Those are the middle dates across the winters of 1991–2020 at Lafayette, TN, 12.3 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 51 days after the last snow.

ZIP 37150 is 12 miles from Lafayette, TN, which stands at 975 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 37083 (Lafayette). The 2023 USDA Plant Hardiness Zone Map lists ZIP 37150 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.