USDA Hardiness Zone 12b
Frost Dates for 96712 — Haleiwa, Hawaii
NOAA 1991–2020 normals from Waimea Valley 892.2, HI (41 ft), 1 miles east.
Updated
No night at or below 32°F was recorded at Waimea Valley 892.2, HI in 1991–2020, not even 36°F, so Haleiwa has no frost dates to plan around; the coolest month, February, averages a low of 62°F.
- Winters with a freeze
- 0%
- Winters with 36°F
- 0%
- Coldest month low
- 62°F
- Hardiness zone
- 12b
32°F or below, 1991–2020
frost possible on leaves
average, February
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 Haleiwa
Waimea Valley 892.2, HI, 1 mile east of Haleiwa, 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 Waimea Valley 892.2, 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 96712 →Compare Haleiwa with another place →
Weather by month in Haleiwa
August is the warmest month at Waimea Valley 892.2, HI, averaging 86°F by day and 70°F at night; January is the coldest at 78°F and 62°F. Not one month recorded a 32°F night; the lowest monthly average low is 62°F.
Warmth for growing adds up to 8,925 growing degree days a year (base 50°F), fewer than at 54% of the 35 Hawaii stations. 46% of them (4,133) have built up by the end of June, and August adds the most, 880. Precipitation totals 52.0 inches a year, most in November (6.1") and least in August (3.2"); May to September bring 34% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 78 | 62 | 4.7 | 0% | 0 | 628 |
| Feb | 79 | 62 | 4.0 | 0% | 0 | 571 |
| Mar | 79 | 64 | 5.6 | 0% | 0 | 668 |
| Apr | 81 | 65 | 4.2 | 0% | 0 | 698 |
| May | 83 | 67 | 3.6 | 0% | 0 | 769 |
| Jun | 84 | 69 | 3.5 | 0% | 0 | 800 |
| Jul | 85 | 70 | 3.9 | 0% | 0 | 854 |
| Aug | 86 | 70 | 3.2 | 0% | 0 | 880 |
| Sep | 86 | 70 | 3.3 | 0% | 0 | 839 |
| Oct | 84 | 69 | 4.4 | 0% | 0 | 822 |
| Nov | 81 | 67 | 6.1 | 0% | 0 | 723 |
| Dec | 79 | 65 | 5.5 | 0% | 0 | 674 |
Monthly normals 1991–2020 at Waimea Valley 892.2, HI (41 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, Poamoho Exp Fm 855.2, HI, 6 miles south of Haleiwa and 681 feet higher, has no 32°F night on record either, and the same coolest-month low, 62°F.
When it snows in Haleiwa, Hawaii
Measurable snow is rare here: only 0 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Waimea Valley 892.2, HI, 1.4 miles away, so there is no typical first-snow date to plan around.
Where these figures come from
ZIP 96712 is 1 mile from Waimea Valley 892.2, HI, which stands at 41 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 96712 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.