Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 29, 2026

Planting zone for 96712 — Haleiwa, HI

ZIP code 96712 (Haleiwa, Honolulu County) is in USDA zone 12b: the coldest winter night averages 55 to 60 °F.

Where ZIP 96712 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 zone12a

Was 12a on the 2012 map — half a zone warmer now. 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 Haleiwa, 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: Haleiwa, 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.

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 Haleiwa, HI.

Soil in Haleiwa, HI

The soil mapped at the center of ZIP 96712 is Kapaa — highly organic silty clay, well drained.

TextureHighly organic silty clayholds water and nutrients; slow to drain and warm up

pH5.0strongly acidic; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter9%high

Hydrologic groupBwater soaks in moderately

Farmland classNot prime farmlandUSDA classification

Map unit: Kapaa silty clay, 40 to 100 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 96712; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Haleiwa, HI

Summer high83 °Faverage high, August

Winter low66 °Faverage low, January

Hot days4days a year at 90 °F or more

Freezing nights0nights a year at 32 °F or less

Growing degree days9,162base 50 °F — the season’s usable heat

Longest day13 h 27 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

Precipitation32.6 inper year, rain and melted snow

Average high and low, by month

Precipitation by month inches

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Kii-Kahuku 911, HI (3 mi away); precipitation: Kii-Kahuku 911, HI (3 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

Wheeler Army Airfield, HI · 12 mi

Schofield Barracks, HI · 12 mi

Hawaii planting zones →

Questions about 96712

What planting zone is ZIP code 96712?

ZIP code 96712 (Haleiwa, 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 96712 get?

About 32.6 inches of precipitation a year (NOAA 1991–2020 normals, Kii-Kahuku 911 station).

How hot do summers get in Haleiwa, HI?

The average high peaks at 83 °F in August, with about 4 days a year at 90 °F or more.

What kind of soil does 96712 have?

The USDA soil survey maps Kapaa at the center of ZIP 96712: highly organic silty clay, well drained, pH about 5.0 (strongly acidic).

What kind of onions grow in Haleiwa, HI?

Short-day onions: the longest day near 96712 is 13 h 27 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.

Did the zone for 96712 change?

Yes. The 2012 USDA map put 96712 in zone 12a; the 2023 map puts it in zone 12b. The newer map uses 1991–2020 data and more weather stations.