Honolulu, HI 96739 Frost Dates
Honolulu, HI: when does the frost end?
The last spring frost here typically falls around 04/12, about 227 days from today. Fall's first freeze usually shows up around 12/01, roughly 235 days after the last spring frost.
Zone 13a (60 to 65°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Honolulu, not a forecast for this year.
Stretching the season past the first frost
With roughly 14 weeks until Honolulu's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/12 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/13 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/18 and only about 1 year in 10 sees frost after that.
Honolulu against the rest of the dataset
Honolulu's growing season runs about 235 days, ranking 9,532 of 40,283 US ZIP codes measured here, longest to shortest. Within HI, it ranks 132 of 133.
Learn more
Before leaning on 96739's figures: zone vs. frost date explains why Zone 13a and Honolulu's frost date answer different questions, while the frost range explains how to read the range around Honolulu's dates instead of trusting one.