Frost Dates for 70449 — Maurepas, Louisiana

Half of springs at Reserve, LA see their last 32°F night by February 9; only one in ten is past it by January 13, and one in ten still has one after March 11. Planting tender crops after February 24 leaves a 30% risk of a frost on them, after March 1 20%, and after March 11 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 21 one year in ten, and holds off past January 13 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 26, 13 days before the 32°F one. The freeze-free season lasts 308 days in a typical year, longer than at 85% of the 88 Louisiana stations; it reaches 345 days one year in ten and falls short of 272 one year in ten. On average 13 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 18 days longer, to about February 27, and return around November 28. A 24°F night is unusual: 41% of winters had one.

July is the warmest month at Reserve, LA, averaging 92°F by day and 75°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 54% of years and March still brings one in 20% of years.

Warmth for growing adds up to 7,171 growing degree days a year (base 50°F), more than at 83% of the 88 Louisiana stations. 42% of them (3,033) have built up by the end of June, and July adds the most, 1,028. Precipitation totals 67.2 inches a year, most in June (8.6") and least in October (4.1"); May to September bring 49% of it.

The nearest other station, Donaldsonville 4 SW, LA, 23 miles southwest of Maurepas, has a last frost 12 days later (February 21), a first frost 9 days earlier (December 5), a season 17 days shorter.

Measurable snow is rare here: only 0 of 19 winters from 1991 to 2020 recorded 0.1 inch or more at Reserve, LA, 17.3 miles away, so there is no typical first-snow date to plan around.

ZIP 70449 is 17 miles from Reserve, LA, which stands at 15 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 6 other ZIP codes share the station; its figures are presented in full for 70068 (La Place). The 2023 USDA Plant Hardiness Zone Map lists ZIP 70449 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.