Frost Dates for 37030 — Carthage, Tennessee

Half of springs at Carthage, TN see their last 32°F night by April 10; only one in ten is past it by March 26, and one in ten still has one after April 27. Planting tender crops after April 17 leaves a 30% risk of a frost on them, after April 21 20%, and after April 27 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 29 in half of years, as early as October 17 one year in ten, and holds off past November 11 one year in ten. A hard freeze of 28°F follows 10 days later, around November 8; in spring the one-in-ten date for 28°F is April 14, 13 days before the 32°F one. The freeze-free season lasts 201 days in a typical year, shorter than at 58% of the 144 Tennessee stations; it reaches 220 days one year in ten and falls short of 181 one year in ten. On average 86 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 23, and return around October 20. Severe cold of 16°F or below comes in 98% of winters, usually between December 23 and February 13.

July is the warmest month at Carthage, TN, averaging 89°F by day and 67°F at night; January is the coldest at 48°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 78% of years.

Warmth for growing adds up to 4,450 growing degree days a year (base 50°F), fewer than at 51% of the 144 Tennessee stations. 37% of them (1,659) have built up by the end of June, and July adds the most, 869. Precipitation totals 52.5 inches a year, most in March (5.0") and least in September (3.4"); May to September bring 42% of it.

The nearest other station, Lancaster Edgar Evins Marina, TN, 14 miles southeast of Carthage, has a last frost 7 days earlier (April 3), a first frost 6 days later (November 4), a season 14 days longer.

The first measurable snow (0.1 inch or more) in Carthage 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, 1.4 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 60 days after the last snow.

ZIP 37030 is 1 mile from Carthage, TN, which stands at 515 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 37030 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.