USDA Hardiness Zone 11b
Frost Dates for 96771 — Mountain View, Hawaii
NOAA 1991–2020 normals from Glenwood #2 55.4, HI (2,200 ft), 2 miles west.
Updated
No night at or below 32°F was recorded at Glenwood #2 55.4, HI in 1991–2020, not even 36°F, so Mountain View has no frost dates to plan around; the coolest month, February, averages a low of 56°F.
- Winters with a freeze
- 0%
- Winters with 36°F
- 0%
- Coldest month low
- 56°F
- Hardiness zone
- 11b
32°F or below, 1991–2020
frost possible on leaves
average, February
45 to 50°F (7.2 to 10.0°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 Mountain View
Glenwood #2 55.4, HI, 2 miles west of Mountain View, 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 Glenwood #2 55.4, 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 96771 →Compare Mountain View with another place →
Weather by month in Mountain View
September is the warmest month at Glenwood #2 55.4, HI, averaging 78°F by day and 61°F at night; February is the coldest at 72°F and 56°F. Not one month recorded a 32°F night; the lowest monthly average low is 56°F.
Warmth for growing adds up to 6,210 growing degree days a year (base 50°F), fewer than at 91% of the 35 Hawaii stations. 46% of them (2,845) have built up by the end of June, and August adds the most, 608. Precipitation totals 229.1 inches a year, most in August (23.5") and least in January (13.1"); May to September bring 40% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 74 | 56 | 13.1 | 0% | 0 | 467 |
| Feb | 72 | 56 | 15.8 | 0% | 0 | 392 |
| Mar | 73 | 57 | 22.9 | 0% | 0 | 457 |
| Apr | 73 | 58 | 22.0 | 0% | 0 | 464 |
| May | 75 | 59 | 15.0 | 0% | 0 | 521 |
| Jun | 76 | 60 | 18.1 | 0% | 0 | 545 |
| Jul | 77 | 62 | 19.0 | 0% | 0 | 594 |
| Aug | 77 | 62 | 23.5 | 0% | 0 | 608 |
| Sep | 78 | 61 | 16.1 | 0% | 0 | 594 |
| Oct | 77 | 61 | 18.2 | 0% | 0 | 581 |
| Nov | 75 | 59 | 23.1 | 0% | 0 | 507 |
| Dec | 74 | 57 | 22.3 | 0% | 0 | 482 |
Monthly normals 1991–2020 at Glenwood #2 55.4, HI (2,200 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, Hilo 5 S, HI, 9 miles north of Mountain View and 1,578 feet lower, has no 32°F night on record either, and a coolest-month low 5°F warmer (61°F).
When it snows in Mountain View, Hawaii
Measurable snow is rare here: only 0 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Waiakea Scd 88.2, HI, 9.9 miles away, so there is no typical first-snow date to plan around.
Where these figures come from
ZIP 96771 is 2 miles from Glenwood #2 55.4, HI, which stands at 2,200 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station; its figures are presented in full for 96778 (Pahoa). The 2023 USDA Plant Hardiness Zone Map lists ZIP 96771 in zone 11b, the band where the coldest night of the year averaged 45 to 50°F (7.2 to 10.0°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.