Honolulu, HI 96821 Frost Dates
Honolulu, HI: when does the frost end?
The NOAA station nearest to 96821 does not report a usable frost-date normal for either event, so no last-frost or first-frost figure is shown here. The USDA hardiness zone below is still real: Zone 12b (55 to 60°F average annual minimum).
Honolulu against the rest of the dataset
Honolulu's growing season runs about 365 days, ranking 207 of 40,283 US ZIP codes measured here, longest to shortest. Within HI, it ranks 104 of 133.
Learn more
Before leaning on 96821's figures: zone vs. frost date explains why Zone 12b and Honolulu's frost date answer different questions, while local microclimates explains what one yard in Honolulu can differ from the 96821 normal.