USDA Hardiness Zone 9b
Frost Dates for 70067 — Lafitte, Louisiana
NOAA 1991–2020 normals from Marrero 9 SSW, LA (3 ft), 9 miles north.
Updated
In Lafitte, the last spring frost (32°F) is around February 10 in half of years and has passed by March 10 in nine years out of ten. The first fall frost comes around December 12, as early as November 20 one year in ten, leaving a typical freeze-free season of 306 days (NOAA, Marrero 9 SSW, LA).
- Last spring frost
- February 10
- First fall frost
- December 12
- Growing season
- 306 days
- Hardiness zone
- 9b
50% probability
50% probability
freeze-free, 50%
25 to 30°F (-3.9 to -1.1°C) coldest night
- First snow
- Rare
- Last snow
- Rare
- Winters with snow
- 11%
- Snow per year
- —
median, 1991–2020
median, 1991–2020
2 of 18 observed
NOAA normal
Frost risk by date in Lafitte
Half of springs at Marrero 9 SSW, LA see their last 32°F night by February 10; only one in ten is past it by January 9, and one in ten still has one after March 10. Planting tender crops after February 25 leaves a 30% risk of a frost on them, after March 3 20%, and after March 10 10%. The 28 days between the even-odds date and the one-in-ten date is wider than at 85% 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 12 in half of years, as early as November 20 one year in ten, and holds off past January 12 one year in ten. A hard freeze of 28°F follows 20 days later, around January 1; in spring the one-in-ten date for 28°F is February 28, 10 days before the 32°F one. The freeze-free season lasts 306 days in a typical year, longer than at 83% of the 88 Louisiana stations; it reaches 342 days one year in ten and falls short of 271 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 19 days longer, to about March 1, and return around November 26. A 24°F night is unusual: 42% of winters had one.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Feb 5 | Feb 13 | Feb 20 | Feb 26 | Mar 1 | Mar 5 | Mar 10 | Mar 15 | Mar 21 |
| 32°F97% of yrs | Jan 9 | Jan 23 | Jan 31 | Feb 4 | Feb 10 | Feb 17 | Feb 25 | Mar 3 | Mar 10 |
| 28°F76% of yrs | Dec 29 | Jan 6 | Jan 14 | Jan 21 | Jan 27 | Jan 31 | Feb 5 | Feb 14 | Feb 28 |
| 24°F42% of yrs | too rare for a date | ||||||||
| 20°F14% of yrs | too rare for a date | ||||||||
| 16°F2% of yrs | too rare for a date | ||||||||
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Nov 9 | Nov 15 | Nov 19 | Nov 23 | Nov 26 | Dec 1 | Dec 3 | Dec 9 | Dec 23 |
| 32°F97% of yrs | Nov 20 | Nov 28 | Dec 2 | Dec 6 | Dec 12 | Dec 20 | Dec 28 | Jan 2 | Jan 12 |
| 28°F76% of yrs | Dec 3 | Dec 11 | Dec 19 | Dec 27 | Jan 1 | Jan 4 | Jan 10 | Jan 18 | Feb 1 |
| 24°F42% of yrs | too rare for a date | ||||||||
| 20°F14% of yrs | too rare for a date | ||||||||
| 16°F2% of yrs | too rare for a date | ||||||||
Freeze probabilities 1991–2020 at Marrero 9 SSW, LA, from NOAA NCEI U.S. Climate Normals. Where a temperature is reached in fewer than 99.5% of years, the dates describe only the years that reach it. Not a forecast.
Frost risk on any date in 70067 →Compare Lafitte with another place →
Weather by month in Lafitte
July is the warmest month at Marrero 9 SSW, LA, averaging 90°F by day and 74°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 55% of years and March still brings one in 23% of years.
Warmth for growing adds up to 6,941 growing degree days a year (base 50°F), more than at 74% of the 88 Louisiana stations. 43% of them (2,983) have built up by the end of June, and July adds the most, 987.
| Month | High °F | Low °F | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|
| Jan | 62 | 43 | 77% | 6 | 162 |
| Feb | 66 | 47 | 55% | 2 | 212 |
| Mar | 72 | 53 | 23% | 1 | 395 |
| Apr | 78 | 58 | 0% | 0 | 539 |
| May | 84 | 66 | 0% | 0 | 772 |
| Jun | 89 | 72 | 0% | 0 | 903 |
| Jul | 90 | 74 | 0% | 0 | 987 |
| Aug | 90 | 74 | 0% | 0 | 981 |
| Sep | 87 | 70 | 0% | 0 | 850 |
| Oct | 79 | 61 | 0% | 0 | 613 |
| Nov | 70 | 51 | 23% | 1 | 327 |
| Dec | 64 | 46 | 65% | 3 | 200 |
Monthly normals 1991–2020 at Marrero 9 SSW, LA (3 ft), NOAA NCEI. "32°F night": chance of at least one in the month. GDD: growing degree days, base 50°F.
Compared with the next station
The nearest other station, New Orleans Alvin Callender Fl, LA, 12 miles northeast of Lafitte, has a last frost 8 days later (February 18), a first frost 6 days earlier (December 6), a season 11 days shorter.
When it snows in Lafitte, Louisiana
Measurable snow is rare here: only 2 of 18 winters from 1991 to 2020 recorded 0.1 inch or more at Marrero 9 SSW, LA, 9.2 miles away, so there is no typical first-snow date to plan around.
Planting calendar for 70067
| When | What to do |
|---|---|
| December 2 – December 16 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| December 16 – December 30 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| January 13 – January 27 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| February 10 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by September 19 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by November 28 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| December 12 onward | Plant garlic, mulch beds, lift tender bulbsGarlic wants a cold spell; bare soil loses structure over winter. |
The weeks before and after the 50% dates are general rules of thumb, not NOAA figures; a seed packet gives the timing for each variety.
Where these figures come from
ZIP 70067 is 9 miles from Marrero 9 SSW, LA, which stands at 3 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 70067 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.
Frost dates across Louisiana →
Hardiness zone and temperature range: USDA Plant Hardiness Zone Map 2023 (USDA-ARS, Oregon State University), ZIP-code listing, unchanged. °C converted from °F by this site.
Thirty-year averages, not a forecast: check the forecast before planting out. How stations are matched and which pages are offered to search engines: methodology.