Frost Dates for 37090 — Lebanon, Tennessee

Half of springs at Lebanon, TN see their last 32°F night by April 6; 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 13 leaves a 30% risk of a frost on them, after April 17 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 28 in half of years, as early as October 15 one year in ten, and holds off past November 11 one year in ten. A hard freeze of 28°F follows 11 days later, around November 8; in spring the one-in-ten date for 28°F is April 10, 13 days before the 32°F one. The freeze-free season lasts 206 days in a typical year, longer than at 54% of the 144 Tennessee stations; it reaches 228 days one year in ten and falls short of 185 one year in ten. On average 91 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 19. Severe cold of 16°F or below comes in 98% of winters, usually between December 25 and February 12.

July is the warmest month at Lebanon, TN, averaging 90°F by day and 69°F at night; January is the coldest at 47°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 68% of years.

Warmth for growing adds up to 4,688 growing degree days a year (base 50°F), more than at 74% of the 144 Tennessee stations. 38% of them (1,788) have built up by the end of June, and July adds the most, 921. Precipitation totals 54.5 inches a year, most in May (5.6") and least in October (3.4"); May to September bring 42% of it.

The nearest other station, Old Hickory WFO, TN, 16 miles northwest of Lebanon, has a last frost 5 days earlier (April 1), a first frost 7 days later (November 4), a season 10 days longer.

The first measurable snow (0.1 inch or more) in Lebanon usually arrives around January 8, and the last of the season around February 25. Those are the middle dates across the winters of 1991–2020 at Old Hickory WFO, TN, 15.7 miles away: half of years saw snow earlier, half later. Snow fell in 96% of those winters. The last 32°F night of spring typically comes 40 days after the last snow.

ZIP 37090 is 6 miles from Lebanon, TN, which stands at 525 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 37087 (Lebanon). The 2023 USDA Plant Hardiness Zone Map lists ZIP 37090 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.