Frost dates in Hawaii

Hawaii has one NOAA station with a frost every year: Mauna Loa 5 NNE, where the typical last spring frost is April 12.

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Last frost across Hawaii

At 1 station a freezing night doesn't come every winter, so the dates there apply only to the years that have one.

At 48 stations, frost comes in fewer than 1 year in 10, too rarely for frost dates.

These are typical dates: in half of springs the last frost comes later. Each place's page, and each ZIP code lookup, also gives the late-year date, after which only 1 spring in 10 has a frost. That's the safer date for tender plants.

None of Hawaii's towns has a page of its own here, because frost is too rare at the stations nearest them for frost dates to mean much. The station list below has every NOAA station in the state, and the ZIP code lookup above gives your hardiness zone.

Hardiness zones in Hawaii

Hawaii's 133 ZIP codes in the USDA list fall in zones 10b to 13a: 10b (1 percent), 11a (6 percent), 11b (2 percent), 12a (18 percent), 12b (71 percent) and 13a (2 percent). Compared with the 2012 map, 13 percent of them moved to a warmer half zone, 77 percent stayed the same and 14 moved to a colder one.

A hardiness zone is about the coldest night of winter, which decides which shrubs, trees and perennials survive. Frost dates are about spring and fall, which decide when to plant. You need both. Read more about what the zones mean and what changed in 2023.

Every NOAA station in Hawaii

All 50 stations in Hawaii with frost statistics in NOAA's 1991 to 2020 normals, from A to Z. Station names are usually a town, an airport, or a distance and direction from a town. Find one near you and at a similar elevation.

*Not every winter has a freeze at this station; the date is for the years that do.

Typical (1-in-2) dates at 32°F. For the early and late years, and a planting calendar built from your own dates, look up your ZIP code.