Wailuku, HI planting zone & frost dates
Wailuku is in USDA hardiness zone 12b. Frost is rare here: in most years temperatures do not drop to 32°F.
USDA hardiness zone12bavg. extreme winter low 55°F to 60°F
FrostRarein most years the nearest weather station records no 32°F freeze
Useful for zone 12b 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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Hardiness zone by ZIP code in Wailuku
- 96793 zone 12b
Nearby cities
- Kahului zone 12b
- Kīhei zone 12b
- Lahaina zone 12b
- East Honolulu zone 12b
- Niu Valley zone 12b
- Kuliouou - Kalani Iki zone 12b
- Kailua zone 12b
- Palolo zone 12b
Questions
What growing zone is Wailuku, HI?
Wailuku is in USDA Plant Hardiness Zone 12b (average extreme winter low 55°F to 60°F), according to the USDA 2023 map.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Kahului Ap, HI (USW00022516), 8.1 km (5.0 mi) from the city center, elevation 16 m, based on 29 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.