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

Planting zone for 96759 — Kunia, HI

ZIP code 96759 (Kunia, Honolulu County) is in USDA zone 12a: the coldest winter night averages 50 to 55 °F.

Where ZIP 96759 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.

Zone12a50 to 55 °F
Coldest night10 to 12.8 °C
Last frostrare
First frostrare
2012 zone12a

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 12a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Kunia, 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: Kunia, HI is in zone 12a, 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 12a in Hawaii

37 plants native to Hawaii, recorded in Hawaii, and rated by the USDA to survive 50 °F or colder — the bottom of zone 12a. 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 Kunia, HI.

Soil in Kunia, HI

The soil mapped at the center of ZIP 96759 is Kolekole — silty clay loam, well drained.

TextureSilty clay loamholds water and nutrients; slow to drain and warm up
pH5.0strongly 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: Kolekole silty clay loam, 1 to 6 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 96759; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Kunia, HI

Summer high83 °Faverage high, August
Winter low60 °Faverage low, February
Hot days1days a year at 90 °F or more
Freezing nights0nights a year at 32 °F or less
Growing degree days7,985base 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
Precipitation64.1 inper year, rain and melted snow

Average high and low, by month

50°60°70°80°90°January: average high 76 °F, low 61 °F 76°61° JanFebruary: average high 76 °F, low 60 °F 76°60° FebMarch: average high 77 °F, low 62 °F 77°62° MarApril: average high 77 °F, low 63 °F 77°63° AprMay: average high 79 °F, low 65 °F 79°65° MayJune: average high 80 °F, low 67 °F 80°67° JunJuly: average high 82 °F, low 67 °F 82°67° JulAugust: average high 83 °F, low 68 °F 83°68° AugSeptember: average high 83 °F, low 67 °F 83°67° SepOctober: average high 82 °F, low 66 °F 82°66° OctNovember: average high 79 °F, low 65 °F 79°65° NovDecember: average high 77 °F, low 63 °F 77°63° Dec

Precipitation by month inches

0″2″4″6″8″January: 5.18 in precipitation 5.2 JanFebruary: 4.31 in precipitation 4.3 FebMarch: 6.30 in precipitation 6.3 MarApril: 5.62 in precipitation 5.6 AprMay: 4.33 in precipitation 4.3 MayJune: 4.23 in precipitation 4.2 JunJuly: 5.17 in precipitation 5.2 JulAugust: 3.96 in precipitation 4.0 AugSeptember: 4.61 in precipitation 4.6 SepOctober: 5.76 in precipitation 5.8 OctNovember: 7.09 in precipitation 7.1 NovDecember: 7.52 in precipitation 7.5 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Upper Wahiawa 874.3, HI (4 mi away); precipitation: Upper Wahiawa 874.3, HI (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

9685712a
Schofield Barracks, HI · 2 mi
9685412a
Wheeler Army Airfield, HI · 2 mi
9679712a
Waipahu, HI · 4 mi
9678612a
Wahiawa, HI · 6 mi
9670712b
Kapolei, HI · 7 mi
9679212b
Waianae, HI · 7 mi
9678912a
Mililani, HI · 8 mi
9670612b
Ewa Beach, HI · 8 mi

Hawaii planting zones →

Questions about 96759

What planting zone is ZIP code 96759?

ZIP code 96759 (Kunia, HI) is in USDA hardiness zone 12a on the 2023 map: the coldest night of an average winter reaches 50 to 55 °F (10 to 12.8 °C).

How much rain and snow does 96759 get?

About 64.1 inches of precipitation a year (NOAA 1991–2020 normals, Upper Wahiawa 874.3 station).

How hot do summers get in Kunia, HI?

The average high peaks at 83 °F in August, with about 1 days a year at 90 °F or more.

What kind of soil does 96759 have?

The USDA soil survey maps Kolekole at the center of ZIP 96759: silty clay loam, well drained, pH about 5.0 (strongly acidic).

What kind of onions grow in Kunia, HI?

Short-day onions: the longest day near 96759 is 13 h 26 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.