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

Planting zone for 96708 — Haiku, HI

ZIP code 96708 (Haiku, Maui County) is in USDA zone 12a: the coldest winter night averages 50 to 55 °F.

Where ZIP 96708 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 zone12b

Was 12b on the 2012 map — half a zone colder now. 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 Haiku, 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: Haiku, 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 Haiku, HI.

Soil in Haiku, HI

The soil mapped at the center of ZIP 96708 is Honomanu — silty clay, well drained.

TextureSilty clayholds water and nutrients; slow to drain and warm up
pH4.0strongly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter21.5%high
Hydrologic groupAwater soaks in fast
Farmland classNot prime farmlandUSDA classification

Map unit: Honomanu-Amalu association.

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 96708; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Haiku, HI

Summer high66 °Faverage high, June
Winter low43 °Faverage low, February
Hot days0days a year at 90 °F or more
Freezing nights0nights a year at 32 °F or less
Growing degree days1,753base 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
Precipitation105.4 inper year, rain and melted snow

Average high and low, by month

30°40°50°60°70°80°32 °FJanuary: average high 61 °F, low 44 °F 61°44° JanFebruary: average high 60 °F, low 43 °F 60°43° FebMarch: average high 60 °F, low 43 °F 60°43° MarApril: average high 61 °F, low 44 °F 61°44° AprMay: average high 63 °F, low 46 °F 63°46° MayJune: average high 66 °F, low 48 °F 66°48° JunJuly: average high 66 °F, low 49 °F 66°49° JulAugust: average high 66 °F, low 49 °F 66°49° AugSeptember: average high 65 °F, low 48 °F 65°48° SepOctober: average high 64 °F, low 48 °F 64°48° OctNovember: average high 63 °F, low 47 °F 63°47° NovDecember: average high 61 °F, low 45 °F 61°45° Dec

Precipitation by month inches

0″2″4″6″8″10″12″January: 8.56 in precipitation 8.6 JanFebruary: 6.16 in precipitation 6.2 FebMarch: 12.19 in precipitation 12.2 MarApril: 10.37 in precipitation 10.4 AprMay: 7.47 in precipitation 7.5 MayJune: 6.69 in precipitation 6.7 JunJuly: 10.12 in precipitation 10.1 JulAugust: 7.78 in precipitation 7.8 AugSeptember: 8.91 in precipitation 8.9 SepOctober: 7.51 in precipitation 7.5 OctNovember: 10.43 in precipitation 10.4 NovDecember: 9.17 in precipitation 9.2 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Haleakala Rs 338, HI (9 mi away); precipitation: Kailua 446, HI (within 1 mile). Daylight is calculated from latitude.

Nearby ZIP codes

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

9676812a
Makawao, HI · 6 mi
9678812a
Pukalani, HI · 6 mi
9677912b
Paia, HI · 10 mi
9679012a
Kula, HI · 12 mi
9671311b
Hana, HI · 13 mi
9673212b
Kahului, HI · 15 mi
9673312b
Kahului, HI · 16 mi
9675312b
Kihei, HI · 17 mi

Hawaii planting zones →

Questions about 96708

What planting zone is ZIP code 96708?

ZIP code 96708 (Haiku, 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 96708 get?

About 105.4 inches of precipitation a year (NOAA 1991–2020 normals, Kailua 446 station).

How hot do summers get in Haiku, HI?

The average high peaks at 66 °F in June, with about 0 days a year at 90 °F or more.

What kind of soil does 96708 have?

The USDA soil survey maps Honomanu at the center of ZIP 96708: silty clay, well drained, pH about 4.0 (strongly acidic).

What kind of onions grow in Haiku, HI?

Short-day onions: the longest day near 96708 is 13 h 24 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.

Did the zone for 96708 change?

Yes. The 2012 USDA map put 96708 in zone 12b; the 2023 map puts it in zone 12a. The newer map uses 1991–2020 data and more weather stations.