Frost Dates for 70394 — Raceland, Louisiana

Half of springs at Thibodaux 4 SE, LA see their last 32°F night by February 5; only one in ten is past it by January 3, and one in ten still has one after March 7. Planting tender crops after February 20 leaves a 30% risk of a frost on them, after February 27 20%, and after March 7 10%. The 30 days between the even-odds date and the one-in-ten date is wider than at 91% of the 88 Louisiana 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 December 14 in half of years, as early as November 19 one year in ten, and holds off past January 15 one year in ten. A hard freeze of 28°F follows 18 days later, around January 1; in spring the one-in-ten date for 28°F is February 21, 14 days before the 32°F one. The freeze-free season lasts 311 days in a typical year, longer than at 89% of the 88 Louisiana stations; it reaches 348 days one year in ten and falls short of 274 one year in ten. On average 11 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 22 days longer, to about February 27, and return around November 29. A 24°F night is unusual: 36% of winters had one.

July is the warmest month at Thibodaux 4 SE, LA, averaging 92°F by day and 75°F at night; January is the coldest at 64°F and 45°F. From April to October the chance of a 32°F night stays under 10% each month. In spring, February still brings one in 50% of years and March still brings one in 15% of years.

Warmth for growing adds up to 7,517 growing degree days a year (base 50°F), more than at 95% of the 88 Louisiana stations. 43% of them (3,254) have built up by the end of June, and July adds the most, 1,042. Precipitation totals 71.3 inches a year, most in June (8.7") and least in November (3.8"); May to September bring 53% of it.

The nearest other station, Houma, LA, 13 miles southwest of Raceland, has the same 50% last-frost date, a first frost 3 days later (December 17), a season 1 day longer.

Measurable snow is rare here: only 0 of 17 winters from 1991 to 2020 recorded 0.1 inch or more at Thibodaux 4 SE, LA, 10.3 miles away, so there is no typical first-snow date to plan around.

ZIP 70394 is 10 miles from Thibodaux 4 SE, LA, which stands at 15 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 3 other ZIP codes share the station; its figures are presented in full for 70301 (Thibodaux). The 2023 USDA Plant Hardiness Zone Map lists ZIP 70394 in zone 9b, the band where the coldest night of the year averaged 25 to 30°F (-3.9 to -1.1°C) over 1991–2020; a zone describes winter lows, not frost dates.