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

Planting zone for Lahaina, HI

Lahaina, HI is in USDA zone 12b across its 2 ZIP codes.

Lahaina on the zone map

Outlined: its 1 ZIP code areas · 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

ZIP codes2

Last frostrare

First frostrare

Growing seasonall year

12b 2 ZIPs

Frost forecast — next 7 nights

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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: Lahaina, 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 Lahaina, HI.

Soil in Lahaina, HI

The soil mapped at the center of ZIP 96761 is Rough mountainous land — silty clay loam, well drained.

TextureSilty clay loamholds water and nutrients; slow to drain and warm up

pH4.3strongly acidic; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter25%high

Hydrologic groupBwater soaks in moderately

Farmland classNot prime farmlandUSDA classification

Map unit: Rough mountainous 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 96761; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Lahaina, HI

Summer high85 °Faverage high, August

Winter low64 °Faverage low, January

Hot days3days a year at 90 °F or more

Freezing nights0nights a year at 32 °F or less

Growing degree days8,814base 50 °F — the season’s usable heat

Longest day13 h 24 mindaylight on June 21

Shortest day10 h 52 mindaylight on December 21

Onions to growShort-daysummer days stay under about 14 h 20 min, so long-day varieties won’t bulb

Precipitation59.4 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: Puukolii 457.1, HI (4 mi away); precipitation: Mahinahina 466, HI (4 mi away). Daylight is calculated from latitude.

ZIP codes in Lahaina

Hawaii planting zones →

Questions about Lahaina

What planting zone is Lahaina, HI?

Lahaina, HI is in USDA hardiness zone 12b on the 2023 map (12b: 55 to 60 °F).

What kind of onions grow in Lahaina, HI?

Short-day onions: the longest day is 13 h 24 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.

How much rain and snow does Lahaina, HI get?

About 59.4 inches of precipitation a year (NOAA 1991–2020 normals).