USDA Hardiness Zone 12b
Frost Dates for 96814 — Honolulu, Hawaii
NOAA 1991–2020 normals from Waikiki 717.2, HI (10 ft), 3 miles southeast.
Updated
No night at or below 32°F was recorded at Waikiki 717.2, HI in 1991–2020, not even 36°F, so Honolulu has no frost dates to plan around; the coolest month, January, averages a low of 66°F.
- Winters with a freeze
- 0%
- Winters with 36°F
- 0%
- Coldest month low
- 66°F
- Hardiness zone
- 12b
32°F or below, 1991–2020
frost possible on leaves
average, January
55 to 60°F (12.8 to 15.6°C) coldest night
- First snow
- Rare
- Last snow
- Rare
- Winters with snow
- 0%
- Snow per year
- 0"
median, 1991–2020
median, 1991–2020
0 of 20 observed
NOAA normal
Frost risk by date in Honolulu
Waikiki 717.2, HI, 3 miles southeast of Honolulu, did not record a night at or below 32°F in 1991–2020. 36 of the 37 other Hawaii stations behind this site's ZIP pages recorded no 32°F night either.
Freeze probabilities 1991–2020 at Waikiki 717.2, HI, from NOAA NCEI U.S. Climate Normals. Where a temperature is reached in fewer than 99.5% of years, the dates describe only the years that reach it. Not a forecast.
Frost risk on any date in 96814 →Compare Honolulu with another place →
Weather by month in Honolulu
August is the warmest month at Waikiki 717.2, HI, averaging 88°F by day and 75°F at night; January is the coldest at 81°F and 66°F. Not one month recorded a 32°F night; the lowest monthly average low is 66°F.
Warmth for growing adds up to 10,097 growing degree days a year (base 50°F), more than at 91% of the 35 Hawaii stations. 47% of them (4,695) have built up by the end of June, and August adds the most, 977. Precipitation totals 20.6 inches a year, most in March (3.2") and least in June (0.6"); May to September bring 19% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 81 | 66 | 2.4 | 0% | 0 | 721 |
| Feb | 81 | 66 | 2.0 | 0% | 0 | 659 |
| Mar | 81 | 68 | 3.2 | 0% | 0 | 760 |
| Apr | 83 | 70 | 1.2 | 0% | 0 | 791 |
| May | 85 | 71 | 1.0 | 0% | 0 | 867 |
| Jun | 87 | 73 | 0.6 | 0% | 0 | 899 |
| Jul | 87 | 75 | 0.7 | 0% | 0 | 955 |
| Aug | 88 | 75 | 0.7 | 0% | 0 | 977 |
| Sep | 88 | 74 | 1.0 | 0% | 0 | 932 |
| Oct | 87 | 73 | 2.2 | 0% | 0 | 928 |
| Nov | 84 | 72 | 2.6 | 0% | 0 | 830 |
| Dec | 82 | 69 | 3.0 | 0% | 0 | 781 |
Monthly normals 1991–2020 at Waikiki 717.2, HI (10 ft), NOAA NCEI. "32°F night": chance of at least one in the month. GDD: growing degree days, base 50°F.
Compared with the next station
The nearest other station, Manoa Lyon Arbo 785.2, HI, 4 miles northeast of Honolulu and 490 feet higher, has no 32°F night on record either, and a coolest-month low 3°F colder (63°F).
When it snows in Honolulu, Hawaii
Measurable snow is rare here: only 0 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Beretania Pump Stn 705, HI, 0.5 miles away, so there is no typical first-snow date to plan around.
Where these figures come from
ZIP 96814 is 3 miles from Waikiki 717.2, HI, which stands at 10 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 4 other ZIP codes share the station; its figures are presented in full for 96816 (Honolulu). The 2023 USDA Plant Hardiness Zone Map lists ZIP 96814 in zone 12b, the band where the coldest night of the year averaged 55 to 60°F (12.8 to 15.6°C) over 1991–2020; a zone describes winter lows, not frost dates.
Hardiness zone and temperature range: USDA Plant Hardiness Zone Map 2023 (USDA-ARS, Oregon State University), ZIP-code listing, unchanged. °C converted from °F by this site.
Thirty-year averages, not a forecast: check the forecast before planting out. How stations are matched and which pages are offered to search engines: methodology.