USDA Hardiness Zone 11a
Frost Dates for 96785 — Volcano, Hawaii
NOAA 1991–2020 normals from Hawaii Vol Np Hq 54, HI (3,971 ft), 3 miles southwest.
Updated
No night at or below 32°F was recorded at Hawaii Vol Np Hq 54, HI in 1991–2020, so Volcano has no frost dates to plan around; the coolest month, February, averages a low of 49°F.
- Winters with a freeze
- 0%
- Winters with 36°F
- 2%
- Coldest month low
- 49°F
- Hardiness zone
- 11a
32°F or below, 1991–2020
frost possible on leaves
average, February
40 to 45°F (4.4 to 7.2°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 Volcano
Hawaii Vol Np Hq 54, HI, 3 miles southwest of Volcano, did not record a night at or below 32°F in 1991–2020; a 36°F night came in 2% of winters. 36 of the 37 other Hawaii stations behind this site's ZIP pages recorded no 32°F night either.
Freeze probabilities 1991–2020 at Hawaii Vol Np Hq 54, 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 96785 →Compare Volcano with another place →
Weather by month in Volcano
August is the warmest month at Hawaii Vol Np Hq 54, HI, averaging 74°F by day and 56°F at night; February is the coldest at 68°F and 49°F. Not one month recorded a 32°F night; the lowest monthly average low is 49°F.
Warmth for growing adds up to 4,280 growing degree days a year (base 50°F), fewer than at 97% of the 35 Hawaii stations. 43% of them (1,853) have built up by the end of June, and August adds the most, 460. Precipitation totals 96.5 inches a year, most in December (11.4") and least in June (5.1"); May to September bring 31% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 68 | 49 | 8.8 | 0% | 0 | 274 |
| Feb | 68 | 49 | 8.2 | 0% | 0 | 245 |
| Mar | 68 | 51 | 10.3 | 0% | 0 | 282 |
| Apr | 68 | 52 | 9.2 | 0% | 0 | 303 |
| May | 71 | 53 | 6.5 | 0% | 0 | 364 |
| Jun | 71 | 54 | 5.1 | 0% | 0 | 384 |
| Jul | 73 | 56 | 6.3 | 0% | 0 | 439 |
| Aug | 74 | 56 | 5.9 | 0% | 0 | 460 |
| Sep | 73 | 55 | 6.0 | 0% | 0 | 429 |
| Oct | 72 | 55 | 8.2 | 0% | 0 | 426 |
| Nov | 70 | 54 | 10.6 | 0% | 0 | 365 |
| Dec | 68 | 52 | 11.4 | 0% | 0 | 309 |
Monthly normals 1991–2020 at Hawaii Vol Np Hq 54, HI (3,971 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, Glenwood #2 55.4, HI, 7 miles northeast of Volcano and 1,771 feet lower, has no 32°F night on record either, and a coolest-month low 7°F warmer (56°F).
When it snows in Volcano, Hawaii
Measurable snow is rare here: only 0 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Hawaii Vol Np Hq 54, HI, 3.2 miles away, so there is no typical first-snow date to plan around.
Where these figures come from
ZIP 96785 is 3 miles from Hawaii Vol Np Hq 54, HI, which stands at 3,971 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 96785 in zone 11a, the band where the coldest night of the year averaged 40 to 45°F (4.4 to 7.2°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.