Frost Dates for 37012 — Alexandria, Tennessee

Half of springs at Lancaster Edgar Evins Marina, 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 18. Planting tender crops after April 10 leaves a 30% risk of a frost on them, after April 14 20%, and after April 18 10%. The 15 days between the even-odds date and the one-in-ten date is narrower than at 78% of the 144 Tennessee stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 4 in half of years, as early as October 22 one year in ten, and holds off past November 19 one year in ten. A hard freeze of 28°F follows 11 days later, around November 15; in spring the one-in-ten date for 28°F is April 9, 9 days before the 32°F one. The freeze-free season lasts 215 days in a typical year, longer than at 81% of the 144 Tennessee stations; it reaches 237 days one year in ten and falls short of 195 one year in ten. On average 72 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 16, and return around October 27. Severe cold of 16°F or below comes in 97% of winters, usually between January 1 and February 14.

July is the warmest month at Lancaster Edgar Evins Marina, TN, averaging 89°F by day and 68°F at night; January is the coldest at 48°F and 29°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 60% of years.

Warmth for growing adds up to 4,686 growing degree days a year (base 50°F), more than at 73% of the 144 Tennessee stations. 38% of them (1,761) have built up by the end of June, and July adds the most, 896.

The nearest other station, Carthage, TN, 12 miles north of Alexandria, has a last frost 7 days later (April 10), a first frost 6 days earlier (October 29), a season 14 days shorter.

The first measurable snow (0.1 inch or more) in Alexandria usually arrives around January 16, and the last of the season around February 9. Those are the middle dates across the winters of 1991–2020 at Carthage, TN, 12.4 miles away: half of years saw snow earlier, half later. Snow fell in 72% of those winters. The last 32°F night of spring typically comes 53 days after the last snow.

ZIP 37012 is 11 miles from Lancaster Edgar Evins Marina, TN, which stands at 630 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 37012 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.