Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated

Planting zone for 70175 — New Orleans, LA

ZIP code 70175 (New Orleans, Orleans County) is in USDA zone 9b: the coldest winter night averages 25 to 30 °F.

Where ZIP 70175 is

tap the map for the zone at any spot · scroll or pinch to zoom

Not the official USDA Plant Hardiness Zone Map. Zones come from the 2023 USDA hardiness-zone data by the PRISM Group, Oregon State University; we re-mapped and recolored them. The official map is at planthardiness.ars.usda.gov.

Zone9b25 to 30 °F
Coldest night−3.9 to −1.1 °C
Last frostrare
First frostrare
2012 zone9b

Same zone as on the 2012 map. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 9b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for New Orleans, LA…

Forecast data: National Weather Service (api.weather.gov), public domain. This is not a warning service — for official frost and freeze warnings see weather.gov.

Frost dates

A 32 °F frost doesn't happen here in most winters. At the nearest station (NOAA station Terrytown 3s, LA — 4 miles away, elevation 10 ft) the median growing season is 330 days. When frost does come, it is a midwinter night or two; cover tender plants when a freeze is forecast.

Frost data: NOAA NCEI U.S. Climate Normals 1991–2020.

When spring arrived in 2026

In 2026, spring leaf-out near 70175 came on Jan 11 — 12 days earlier than the 1991–2020 average (Jan 23).

JanFebMarAprMayJun

The Spring Index marks the day when accumulated warmth is enough for lilac and honeysuckle to leaf out — a widely used signal that the growing season has started. Source: USA National Phenology Network, www.usanpn.org — Spring Indices, first leaf, 2026 (data as of 2026-09-08) and 30-year average 1991–2020 (CC BY 4.0).

Native plants for zone 9b in Louisiana

519 plants native to the lower 48 states, recorded in Louisiana, and rated by the USDA to survive 25 °F or colder — the bottom of zone 9b. Each links to its USDA PLANTS profile.

Trees 69

American basswood100 ft · blooms late spring · low shade tolerance · to −46 °FAmerican beech80 ft · blooms mid spring · low shade tolerance · to −44 °FAmerican chestnut115 ft · blooms early summer · high shade tolerance · to −33 °FAmerican elm120 ft · blooms early spring · medium shade tolerance · to −46 °FAmerican sycamore100 ft · blooms spring · medium shade tolerance · to −34 °Fbald cypress130 ft · blooms mid spring · medium shade tolerance · to −18 °F

Shrubs 108

aloe yucca15 ft · blooms early summer · medium shade tolerance · to −1 °FAmerican beautyberry6 ft · blooms early summer · medium shade tolerance · to −8 °FAmerican hazelnut10 ft · blooms spring · medium shade tolerance · to −33 °FAmerican holly40 ft · blooms mid spring · low shade tolerance · to −20 °FAmerican hornbeam30 ft · blooms mid spring · low shade tolerance · to −34 °FAmerican plum24 ft · blooms mid spring · high shade tolerance · to −38 °F

Wildflowers & perennials 170

American bur-reed3 ft · blooms indeterminate · medium shade tolerance · to −33 °FAmerican century plant6 ft · blooms indeterminate · high shade tolerance · to 12 °FAmerican eelgrass1 ft · blooms mid summer · high shade tolerance · to −33 °FAmerican lotus3 ft · blooms mid summer · high shade tolerance · to −36 °FAmerican pokeweed7 ft · blooms mid summer · low shade tolerance · to −33 °FAmerican spongeplant0.5 ft · blooms mid spring · high shade tolerance · to −24 °F

Grasses 150

American cupscale3 ft · blooms early summer · high shade tolerance · to −18 °Fautumn bluegrass1.5 ft · blooms late spring · medium shade tolerance · to −8 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °Fbeaked spikerush3 ft · blooms late spring · high shade tolerance · to −28 °Fbig bluestem6 ft · blooms summer · high shade tolerance · to −46 °Fbig cordgrass8 ft · blooms spring · high shade tolerance · to −3 °F

Vines 14

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °FAmerican wisteria50 ft · blooms spring · low shade tolerance · to −3 °Fcatbird grape30 ft · blooms late spring · medium shade tolerance · to −13 °Fcupseed30 ft · blooms late spring · low shade tolerance · to −3 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °Ffrost grape83 ft · blooms late spring · medium shade tolerance · to −23 °F

Source: USDA, NRCS. 2026. The PLANTS Database (plants.usda.gov), National Plant Data Team — state distribution, native status and the “Temperature, Minimum” characteristic. Check light, moisture and soil needs before buying; local nurseries and your state native plant society can confirm what thrives in New Orleans, LA.

Soil in New Orleans, LA

The center of ZIP 70175 is mapped as Urban land: built-over ground without natural soil data. Garden soil here is usually imported or disturbed — test before you plant.

Soil Survey Staff, Natural Resources Conservation Service, USDA. Soil Survey Geographic (SSURGO) Database, via Soil Data Access, accessed 2026-10-29. The soil at the center point of ZIP 70175; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in New Orleans, LA

Summer high92 °Faverage high, July
Winter low45 °Faverage low, January
Hot days90days a year at 90 °F or more
Freezing nights7nights a year at 32 °F or less
Growing degree days7,565base 50 °F — the season’s usable heat
Longest day14 h 04 mindaylight on June 21
Shortest day10 h 13 mindaylight on December 21
Onions to growShort-daysummer days stay under about 14 h 20 min, so long-day varieties won’t bulb
Precipitation69.4 inper year, rain and melted snow

Average high and low, by month

30°40°50°60°70°80°90°100°32 °FJanuary: average high 63 °F, low 45 °F 63°45° JanFebruary: average high 66 °F, low 49 °F 66°49° FebMarch: average high 73 °F, low 54 °F 73°54° MarApril: average high 78 °F, low 61 °F 78°61° AprMay: average high 85 °F, low 68 °F 85°68° MayJune: average high 90 °F, low 75 °F 90°75° JunJuly: average high 92 °F, low 76 °F 92°76° JulAugust: average high 92 °F, low 76 °F 92°76° AugSeptember: average high 89 °F, low 73 °F 89°73° SepOctober: average high 81 °F, low 63 °F 81°63° OctNovember: average high 72 °F, low 53 °F 72°53° NovDecember: average high 65 °F, low 48 °F 65°48° Dec

Precipitation by month inches

0″2″4″6″8″January: 5.64 in precipitation 5.6 JanFebruary: 4.38 in precipitation 4.4 FebMarch: 5.00 in precipitation 5.0 MarApril: 5.56 in precipitation 5.6 AprMay: 5.63 in precipitation 5.6 MayJune: 8.36 in precipitation 8.4 JunJuly: 8.34 in precipitation 8.3 JulAugust: 7.66 in precipitation 7.7 AugSeptember: 5.94 in precipitation 5.9 SepOctober: 4.14 in precipitation 4.1 OctNovember: 4.11 in precipitation 4.1 NovDecember: 4.68 in precipitation 4.7 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Terrytown 3s, LA (4 mi away); precipitation: New Orleans Algiers, LA (within 1 mile). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 9b.

701419b
New Orleans, LA · <1 mi
701429b
New Orleans, LA · <1 mi
701439b
New Orleans, LA · <1 mi
701459b
New Orleans, LA · <1 mi
701469b
New Orleans, LA · <1 mi
701509b
New Orleans, LA · <1 mi
701519b
New Orleans, LA · <1 mi
701529b
New Orleans, LA · <1 mi

All 61 ZIP codes in New Orleans → · Louisiana planting zones →

Questions about 70175

What planting zone is ZIP code 70175?

ZIP code 70175 (New Orleans, LA) is in USDA hardiness zone 9b on the 2023 map: the coldest night of an average winter reaches 25 to 30 °F (−3.9 to −1.1 °C).

How much rain and snow does 70175 get?

About 69.4 inches of precipitation a year (NOAA 1991–2020 normals, New Orleans Algiers station).

How hot do summers get in New Orleans, LA?

The average high peaks at 92 °F in July, with about 90 days a year at 90 °F or more.

Did spring come early in New Orleans, LA in 2026?

Spring leaf-out near 70175 came on Jan 11 in 2026, 12 days earlier than the 1991–2020 average (Jan 23), according to the USA National Phenology Network Spring Index.

What kind of onions grow in New Orleans, LA?

Short-day onions: the longest day near 70175 is 14 h 04 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.