Mililani Mauka, HI planting zone & frost dates

Mililani Mauka is in USDA hardiness zone 12a. Frost is rare here: in most years temperatures do not drop to 32°F.

USDA hardiness zone12aavg. extreme winter low 50°F to 55°F

FrostRarein most years the nearest weather station records no 32°F freeze

Useful for zone 12a gardens

Drip irrigation kit — saves water in long, hot seasons
Shade cloth — protects plants from midday sun
Soil moisture meter
Plants for zone 12

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Nearby cities

Mililani Mauka / Launani Valley zone 12a
Mililani Town zone 12a
Wahiawā zone 12a
Waipio zone 12a
Schofield Barracks zone 12a
Pearl City zone 12a
Village Park zone 12a
Royal Kunia zone 12a

All cities in Hawaii → · Other zone 12a cities →

Questions

What growing zone is Mililani Mauka, HI?

Mililani Mauka is in USDA Plant Hardiness Zone 12a (average extreme winter low 50°F to 55°F), according to the USDA 2023 map.

Frost dates: NOAA U.S. Climate Normals 1991–2020, station Upper Wahiawa 874.3, HI (USC00518838), 2.9 km (1.8 mi) from the city center, elevation 307 m, based on 11 years of records. Hardiness zone: USDA Plant Hardiness Zone Map 2023 for the ZIP code nearest to the city center. Microclimates (valleys, hills, cities, coasts) can be warmer or colder: check the local forecast before planting. How we calculate the data.