White Harbor Labs › Frost Dates › States › Hawaii
Frost Dates in Hawaii
Hawaii's tropical climate means a killing frost is essentially unknown in populated areas — most of the islands never see 32°F. The NOAA 1991–2020 normals dataset contains no freeze stations in Hawaii because there is no freeze record to keep.
Typical last spring frost
None
lowlands stay frost-free
Typical first fall frost
None
year-round growing season
Growing season
365 days
limited by rain, not frost
NOAA stations
0
no freeze records exist
What Hawaii gardeners should know
Without frost, planting in Hawaii is governed by rainfall and elevation, not temperature. Wet windward areas suit taro, ginger, and leafy greens; drier leeward areas need irrigation for the same crops. Above roughly 4,000 feet (e.g., upland Maui and the Big Island), light frost is possible on the coldest winter nights — gardeners there should watch overnight lows rather than a calendar date.
For gardeners anywhere else, look up frost dates by ZIP code on the main tool.
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How this is computed
This state summary is derived from the NOAA NCEI 1991–2020 U.S. Climate Normals freeze data. Hawaii has no stations with freeze records in that dataset; the frost-free characterization reflects the absence of 32°F events in populated lowland areas across the normals period.
Frequently asked questions
Does it frost in Hawaii?
In populated lowland areas, essentially no. Hawaii's tropical climate keeps temperatures above 32°F year-round; the NOAA 1991–2020 normals dataset has no freeze stations in the state. Only high elevations above about 4,000 feet see occasional light frost.
When can I plant in Hawaii?
Year-round in the lowlands. Timing is governed by wet/dry seasons and elevation rather than frost dates — plant with the rains on the windward side, irrigate on the leeward side.
Where does this data come from?
The NOAA National Centers for Environmental Information 1991–2020 U.S. Climate Normals freeze data (public domain). No dates are estimated or interpolated.