Frost Dates for 75845 — Groveton, Texas

Half of springs at Groveton, TX see their last 32°F night by March 2; only one in ten is past it by February 1, and one in ten still has one after March 24. Planting tender crops after March 11 leaves a 30% risk of a frost on them, after March 16 20%, and after March 24 10%. The 22 days between the even-odds date and the one-in-ten date is wider than at 63% of the 339 Texas stations behind this site's ZIP pages, so a fixed calendar date is a gamble here.

In fall the first 32°F night comes by November 26 in half of years, as early as November 4 one year in ten, and holds off past December 19 one year in ten. A hard freeze of 28°F follows 16 days later, around December 12; in spring the one-in-ten date for 28°F is March 10, 14 days before the 32°F one. The freeze-free season lasts 267 days in a typical year, longer than at 70% of the 339 Texas stations; it reaches 302 days one year in ten and falls short of 238 one year in ten. On average 26 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 15 days longer, to about March 17, and return around November 11. Nights of 24°F, cold enough to damage hardier plants, come in 74% of winters and 16°F in 6%.

August is the warmest month at Groveton, TX, averaging 97°F by day and 72°F at night; January is the coldest at 62°F and 38°F. A freezing night is all but certain in every month from December to January (a 90% chance or more). From April to October the chance of a 32°F night stays under 10% each month. In spring, February still brings one in 79% of years and March still brings one in 54% of years.

Warmth for growing adds up to 6,936 growing degree days a year (base 50°F), more than at 67% of the 351 Texas stations. 42% of them (2,902) have built up by the end of June, and August adds the most, 1,064.

The nearest other station, Lufkin Angelina Co Airport, TX, 22 miles northeast of Groveton, has a last frost 9 days later (March 11), a first frost 11 days earlier (November 15), a season 20 days shorter.

Measurable snow is rare here: only 1 of 18 winters from 1991 to 2020 recorded 0.1 inch or more at Corrigan 1 ENE, TX, 16.7 miles away, so there is no typical first-snow date to plan around.

ZIP 75845 is 8 miles from Groveton, TX, which stands at 350 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 75845 in zone 9a, the band where the coldest night of the year averaged 20 to 25°F (-6.7 to -3.9°C) over 1991–2020; a zone describes winter lows, not frost dates.