Hilo, HI planting zone & frost dates

Hilo 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 Hilo

96720 zone 11a
96721 zone 12b

Nearby cities

Hawaiian Paradise Park zone 12b
Kailua-Kona zone 13a
Kīhei zone 12b
Kahului zone 12b
Wailuku zone 12b
Lahaina zone 12b
East Honolulu zone 12b
Niu Valley zone 12b

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

Questions

What growing zone is Hilo, HI?

Hilo is in USDA Plant Hardiness Zone 12b (average extreme winter low 55°F to 60°F), according to the USDA 2023 map. Some ZIP codes of the city fall in zone 11a.

Frost dates: NOAA U.S. Climate Normals 1991–2020, station Hilo Intl Ap, HI (USW00021504), 4.1 km (2.5 mi) from the city center, elevation 12 m, based on 26 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.