Frost Dates for 70037 — Belle Chasse, Louisiana

Half of springs at New Orleans Alvin Callender Fl, LA see their last 32°F night by February 18; only one in ten is past it by January 17, and one in ten still has one after March 13. Planting tender crops after February 28 leaves a 30% risk of a frost on them, after March 5 20%, and after March 13 10%. The 23 days between the even-odds date and the one-in-ten date is wider than at 52% 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 6 in half of years, as early as November 15 one year in ten, and holds off past January 7 one year in ten. A hard freeze of 28°F follows 24 days later, around December 30; in spring the one-in-ten date for 28°F is March 1, 12 days before the 32°F one. The freeze-free season lasts 295 days in a typical year, longer than at 76% of the 88 Louisiana stations; it reaches 332 days one year in ten and falls short of 259 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 15 days longer, to about March 5, and return around November 21. A 24°F night is unusual: 47% of winters had one.

August is the warmest month at New Orleans Alvin Callender Fl, LA, averaging 90°F by day and 73°F at night; January is the coldest at 62°F and 43°F. From April to October the chance of a 32°F night stays under 10% each month. In spring, February still brings one in 64% of years and March still brings one in 29% of years.

Warmth for growing adds up to 6,849 growing degree days a year (base 50°F), more than at 69% of the 88 Louisiana stations. 43% of them (2,913) have built up by the end of June, and August adds the most, 980. Precipitation totals 64.1 inches a year, most in July (8.1") and least in October (3.6"); May to September bring 52% of it.

The nearest other station, Terrytown 3S, LA, 6 miles north of Belle Chasse, has a last frost 17 days earlier (February 1), a first frost 25 days later (December 31), a season 35 days longer.

Measurable snow is rare here: only 2 of 18 winters from 1991 to 2020 recorded 0.1 inch or more at Terrytown 3S, LA, 6.3 miles away, so there is no typical first-snow date to plan around.

ZIP 70037 is under a mile from New Orleans Alvin Callender Fl, LA, which stands at 5 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 70037 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.