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

Planting zone for 96706 — Ewa Beach, HI

ZIP code 96706 (Ewa Beach, Honolulu County) is in USDA zone 12b: the coldest winter night averages 55 to 60 °F.

Where ZIP 96706 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 Ewa Beach, 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: Ewa Beach, 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 Ewa Beach, HI.

Soil in Ewa Beach, HI

The soil mapped at the center of ZIP 96706 is Waipahu — silty clay, well drained.

TextureSilty clayholds water and nutrients; slow to drain and warm up
pH6.3slightly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter3%moderate
Hydrologic groupCwater soaks in slowly
Farmland classPrime farmland if irrigatedUSDA classification

Map unit: Waipahu silty clay, 0 to 2 percent slopes.

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 96706; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Ewa Beach, HI

Summer high87 °Faverage high, July
Winter low62 °Faverage low, January
Hot days14days a year at 90 °F or more
Freezing nights0nights a year at 32 °F or less
Growing degree days9,228base 50 °F — the season’s usable heat
Longest day13 h 26 mindaylight on June 21
Shortest day10 h 50 mindaylight on December 21
Onions to growShort-daysummer days stay under about 14 h 20 min, so long-day varieties won’t bulb
Precipitation17.1 inper year, rain and melted snow

Average high and low, by month

50°60°70°80°90°100°January: average high 80 °F, low 62 °F 80°62° JanFebruary: average high 80 °F, low 63 °F 80°63° FebMarch: average high 81 °F, low 64 °F 81°64° MarApril: average high 82 °F, low 66 °F 82°66° AprMay: average high 84 °F, low 67 °F 84°67° MayJune: average high 86 °F, low 69 °F 86°69° JunJuly: average high 87 °F, low 71 °F 87°71° JulAugust: average high 87 °F, low 71 °F 87°71° AugSeptember: average high 87 °F, low 70 °F 87°70° SepOctober: average high 86 °F, low 69 °F 86°69° OctNovember: average high 84 °F, low 67 °F 84°67° NovDecember: average high 81 °F, low 65 °F 81°65° Dec

Precipitation by month inches

0″1″2″3″January: 1.84 in precipitation 1.8 JanFebruary: 1.71 in precipitation 1.7 FebMarch: 2.72 in precipitation 2.7 MarApril: 0.80 in precipitation 0.8 AprMay: 1.02 in precipitation 1.0 MayJune: 0.39 in precipitation 0.4 JunJuly: 0.49 in precipitation 0.5 JulAugust: 0.84 in precipitation 0.8 AugSeptember: 0.76 in precipitation 0.8 SepOctober: 1.72 in precipitation 1.7 OctNovember: 2.21 in precipitation 2.2 NovDecember: 2.56 in precipitation 2.6 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Ewa Beach Usgs 702.2, HI (2 mi away); precipitation: Ewa Beach Usgs 702.2, HI (2 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

9670912b
Kapolei, HI · 2 mi
9670712b
Kapolei, HI · 4 mi
9679712a
Waipahu, HI · 4 mi
9685312b
Jbphh, HI · 5 mi
9681812b
Honolulu, HI · 5 mi
9682012b
Honolulu, HI · 7 mi
9684912b
Honolulu, HI · 7 mi
9675912a
Kunia, HI · 8 mi

Hawaii planting zones →

Questions about 96706

What planting zone is ZIP code 96706?

ZIP code 96706 (Ewa Beach, 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 96706 get?

About 17.1 inches of precipitation a year (NOAA 1991–2020 normals, Ewa Beach Usgs 702.2 station).

How hot do summers get in Ewa Beach, HI?

The average high peaks at 87 °F in July, with about 14 days a year at 90 °F or more.

What kind of soil does 96706 have?

The USDA soil survey maps Waipahu at the center of ZIP 96706: silty clay, well drained, pH about 6.3 (slightly acidic).

What kind of onions grow in Ewa Beach, HI?

Short-day onions: the longest day near 96706 is 13 h 26 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.