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USDA Hardiness Zone 9a

Frost Dates for 71429 — Florien, Louisiana

NOAA 1991–2020 normals from Hodges Gardens, LA (420 ft), 4 miles southeast.

Updated

In Florien, the last spring frost (32°F) is around March 3 in half of years and has passed by March 22 in nine years out of ten. The first fall frost comes around November 27, as early as November 7 one year in ten, leaving a typical freeze-free season of 267 days (NOAA, Hodges Gardens, LA).

Last spring frost
March 3

50% probability

First fall frost
November 27

50% probability

Growing season
267 days

freeze-free, 50%

Hardiness zone
9a

20 to 25°F (-6.7 to -3.9°C) coldest night

First snow
Rare

median, 1991–2020

Last snow
Rare

median, 1991–2020

Winters with snow
6%

1 of 16 observed

Snow per year
0.1"

NOAA normal

Frost risk by date in Florien

Half of springs at Hodges Gardens, LA see their last 32°F night by March 3; only one in ten is past it by February 9, and one in ten still has one after March 22. Planting tender crops after March 11 leaves a 30% risk of a frost on them, after March 15 20%, and after March 22 10%. The 19 days between the even-odds date and the one-in-ten date is narrower than at 78% of the 88 Louisiana stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 27 in half of years, as early as November 7 one year in ten, and holds off past December 20 one year in ten. A hard freeze of 28°F follows 15 days later, around December 12; in spring the one-in-ten date for 28°F is March 11, 11 days before the 32°F one. The freeze-free season lasts 267 days in a typical year, shorter than at 51% of the 88 Louisiana stations; it reaches 297 days one year in ten and falls short of 242 one year in ten. On average 25 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 13 days longer, to about March 16, and return around November 13. Nights of 24°F, cold enough to damage hardier plants, come in 84% of winters and 16°F in 10%.

Spring: the chance of another night this cold after the date
Low90%80%70%60%50%40%30%20%10%
36°FFeb 26Mar 4Mar 8Mar 13Mar 16Mar 20Mar 24Mar 28Apr 4
32°FFeb 9Feb 18Feb 24Feb 28Mar 3Mar 7Mar 11Mar 15Mar 22
28°F99% of yrsJan 17Jan 26Feb 1Feb 9Feb 16Feb 23Feb 28Mar 4Mar 11
24°F84% of yrsJan 3Jan 11Jan 18Jan 25Jan 31Feb 5Feb 10Feb 22Mar 1
20°F44% of yrstoo rare for a date
16°F10% of yrstoo rare for a date
Fall: the chance the first night this cold has come by the date
Low10%20%30%40%50%60%70%80%90%
36°FOct 30Nov 2Nov 6Nov 10Nov 13Nov 17Nov 21Nov 27Dec 2
32°FNov 7Nov 12Nov 18Nov 22Nov 27Dec 1Dec 4Dec 10Dec 20
28°F99% of yrsNov 18Nov 27Dec 2Dec 7Dec 12Dec 20Dec 28Jan 2Jan 11
24°F84% of yrsDec 7Dec 17Dec 26Jan 1Jan 3Jan 8Jan 13Jan 19Feb 1
20°F44% of yrstoo rare for a date
16°F10% of yrstoo rare for a date

Freeze probabilities 1991–2020 at Hodges Gardens, 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 71429 →Compare Florien with another place →

Weather by month in Florien

August is the warmest month at Hodges Gardens, LA, averaging 94°F by day and 72°F at night; January is the coldest at 58°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 88% of years and March still brings one in 57% of years.

Warmth for growing adds up to 6,446 growing degree days a year (base 50°F), fewer than at 60% of the 88 Louisiana stations. 41% of them (2,668) have built up by the end of June, and August adds the most, 1,018. Precipitation totals 58.9 inches a year, most in January (6.0") and least in July (3.7"); May to September bring 37% of it.

Monthly normals 1991–2020 at Hodges Gardens, LA
MonthHigh °FLow °FPrecip. in32°F nightNights ≤ 32°FGDD 50°F
Jan58386.098%1099
Feb63414.888%5139
Mar70485.357%2305
Apr77555.10%0490
May84634.60%0736
Jun90704.50%0900
Jul93733.70%01017
Aug94724.40%01018
Sep88674.40%0825
Oct79564.72%0546
Nov68475.858%2250
Dec60415.692%7123

Monthly normals 1991–2020 at Hodges Gardens, LA (420 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, Many, LA, 13 miles north of Florien and 165 feet lower, has a last frost 17 days later (March 20), a first frost 18 days earlier (November 9), a season 31 days shorter.

Frost dates for 71449 (Many) →

When it snows in Florien, Louisiana

Measurable snow is rare here: only 1 of 16 winters from 1991 to 2020 recorded 0.1 inch or more at Hodges Gardens, LA, 3.5 miles away, so there is no typical first-snow date to plan around.

Planting calendar for 71429

What to do and when, from the 50% frost dates for Florien, Louisiana
WhenWhat to do
December 23 – January 6Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out.
January 6 – January 20Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early.
February 3 – February 17Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil.
March 3 onwardTransplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast.
by September 4Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops.
by November 13Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation.
November 27 onwardPlant 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 71429 is 4 miles from Hodges Gardens, LA, which stands at 420 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 71429 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.

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.

Other zone 9a places in Louisiana