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

Planting zone for 96792 — Waianae, HI

ZIP code 96792 (Waianae, Honolulu County) is in USDA zone 12b: the coldest winter night averages 55 to 60 °F.

Where ZIP 96792 is

Outlined: the ZIP code area · 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.

Zone12b55 to 60 °F
Coldest night12.8 to 15.6 °C
Last frostrare
First frostrare
2012 zone12b

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 12b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Waianae, HI…

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

Frost is rare or absent here: Waianae, HI is in zone 12b, where the coldest night of a typical winter stays above freezing. Cool-season vegetables grow best from fall through spring; summer heat, not frost, is the limit.

Native plants for zone 12b in Hawaii

37 plants native to Hawaii, recorded in Hawaii, and rated by the USDA to survive 55 °F or colder — the bottom of zone 12b. Each links to its USDA PLANTS profile.

Trees 7

Chamisso's manfern10 ft · blooms indeterminate · medium shade tolerance · to 40 °Fhapu'u8 ft · blooms indeterminate · medium shade tolerance · to 40 °FHawai'i pritchardia60 ft · medium shade tolerance · to 40 °FKamalo pritchardia16 ft · medium shade tolerance · to 40 °Fkoa110 ft · blooms spring · high shade tolerance · to 31 °Fkoaoha40 ft · blooms early spring · high shade tolerance · to 25 °F

Shrubs 12

'ala'a40 ft · medium shade tolerance · to 40 °F'ohi'a lehua65 ft · blooms late spring · high shade tolerance · to 22 °Fbeach naupaka10 ft · blooms indeterminate · medium shade tolerance · to 31 °FGaudichaud's senna2 ft · to 40 °FHawai'i desert-thorn1 ft · blooms summer · medium shade tolerance · to 40 °FHawai'i hawthorn12 ft · blooms spring · medium shade tolerance · to 35 °F

Wildflowers & perennials 8

bayhops1 ft · blooms indeterminate · medium shade tolerance · to 17 °Fbeach strawberry0.8 ft · blooms early spring · medium shade tolerance · to −33 °Fcommon duckmeatblooms late summer · medium shade tolerance · to −38 °Fcommon maidenhair1.7 ft · blooms summer · low shade tolerance · to −33 °Flongleaf pondweedblooms mid summer · high shade tolerance · to −38 °Fsalt heliotrope1.2 ft · blooms mid spring · high shade tolerance · to −28 °F

Grasses 10

blunt spikerush1.6 ft · blooms summer · high shade tolerance · to 37 °Fcosmopolitan bulrush3 ft · blooms late summer · high shade tolerance · to −23 °Ffragrant flatsedge2 ft · blooms late summer · high shade tolerance · to 42 °Fkawelu3 ft · high shade tolerance · to 40 °Fmanyspike flatsedge1.6 ft · blooms mid summer · high shade tolerance · to 47 °Fovate spikerush1.5 ft · blooms late summer · high shade tolerance · to 47 °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 Waianae, HI.

Soil in Waianae, HI

The soil mapped at the center of ZIP 96792 is Stony land — extremely stony silty clay loam, well drained.

TextureExtremely stony silty clay loamholds water and nutrients; slow to drain and warm up
pH7.0neutral; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter1.25%low — add compost
Hydrologic groupBwater soaks in moderately
Farmland classNot prime farmlandUSDA classification

Map unit: Stony land.

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 96792; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Waianae, HI

Summer high86 °Faverage high, August
Winter low64 °Faverage low, February
Hot days1days a year at 90 °F or more
Freezing nights0nights a year at 32 °F or less
Growing degree days9,084base 50 °F — the season’s usable heat
Longest day13 h 26 mindaylight on June 21
Shortest day10 h 49 mindaylight on December 21
Onions to growShort-daysummer days stay under about 14 h 20 min, so long-day varieties won’t bulb
Precipitation21.8 inper year, rain and melted snow

Average high and low, by month

50°60°70°80°90°100°January: average high 79 °F, low 65 °F 79°65° JanFebruary: average high 78 °F, low 64 °F 78°64° FebMarch: average high 79 °F, low 65 °F 79°65° MarApril: average high 80 °F, low 66 °F 80°66° AprMay: average high 82 °F, low 68 °F 82°68° MayJune: average high 83 °F, low 69 °F 83°69° JunJuly: average high 85 °F, low 70 °F 85°70° JulAugust: average high 86 °F, low 70 °F 86°70° AugSeptember: average high 85 °F, low 70 °F 85°70° SepOctober: average high 85 °F, low 70 °F 85°70° OctNovember: average high 82 °F, low 69 °F 82°69° NovDecember: average high 80 °F, low 67 °F 80°67° Dec

Precipitation by month inches

0″1″2″3″4″January: 3.18 in precipitation 3.2 JanFebruary: 2.27 in precipitation 2.3 FebMarch: 2.74 in precipitation 2.7 MarApril: 1.35 in precipitation 1.4 AprMay: 1.64 in precipitation 1.6 MayJune: 0.80 in precipitation 0.8 JunJuly: 0.47 in precipitation 0.5 JulAugust: 0.74 in precipitation 0.7 AugSeptember: 0.92 in precipitation 0.9 SepOctober: 1.93 in precipitation 1.9 OctNovember: 2.54 in precipitation 2.5 NovDecember: 3.20 in precipitation 3.2 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Makaha Ctry Club 800.3, HI (2 mi away); precipitation: Makaha Ctry Club 800.3, HI (2 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

6 of the 8 nearest ZIP codes are in a different zone — elevation and distance from water change winter lows quickly.

9679112a
Waialua, HI · 7 mi
9675912a
Kunia, HI · 7 mi
9685712a
Schofield Barracks, HI · 7 mi
9685412a
Wheeler Army Airfield, HI · 9 mi
9670712b
Kapolei, HI · 9 mi
9678612a
Wahiawa, HI · 10 mi
9679712a
Waipahu, HI · 10 mi
9670612b
Ewa Beach, HI · 13 mi

Hawaii planting zones →

Questions about 96792

What planting zone is ZIP code 96792?

ZIP code 96792 (Waianae, HI) is in USDA hardiness zone 12b on the 2023 map: the coldest night of an average winter reaches 55 to 60 °F (12.8 to 15.6 °C).

How much rain and snow does 96792 get?

About 21.8 inches of precipitation a year (NOAA 1991–2020 normals, Makaha Ctry Club 800.3 station).

How hot do summers get in Waianae, HI?

The average high peaks at 86 °F in August, with about 1 days a year at 90 °F or more.

What kind of soil does 96792 have?

The USDA soil survey maps Stony land at the center of ZIP 96792: extremely stony silty clay loam, well drained, pH about 7.0 (neutral).

What kind of onions grow in Waianae, HI?

Short-day onions: the longest day near 96792 is 13 h 26 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.