Few U.S. towns have milder winter nights than Discovery Harbour
Sunny July days climb to about 78°. Summers stay cool: July afternoons here are cooler than in 96% of U.S. towns. The gap between a January night and a July afternoon is 25°. Long walks are most pleasant from January to December, when afternoons reach 75–79°.
A year in Discovery Harbour at a glance
Each month’s typical high and low, and what it brings.
What stands out about Discovery Harbour’s climate
Compared with towns across the U.S., with Discovery Harbour’s place in Hawaii beside it.
What a year in Discovery Harbour feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
Frost is rare
Frost and day counts come from NOAA’s station at Opihihale #2 24.1, HI, 23 miles from the town’s center, 320 ft higher.
The 2023 USDA map puts Discovery Harbour’s center in zone 12b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 55°. Plant labels use the zone; frost dates tell you when to plant.
About 21 inches of rain a year
January is the wettest month and June the driest. Rain falls on about 113 days a year. Snow is rare: about 0.0" in a normal year at S Kona 2 2.32, HI, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Discovery Harbour
5% of the work is heating, so air conditioning is the bigger bill. No month averages under 55°.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Opihihale #2 24.1, HI.
Living with Discovery Harbour’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
Zone 12b. Frost almost never comes, so tender plants can often stay out through winter.
Months with highs of 62–84° and lows of 40° or more: January, February, March, April, May, June, July, August, September, October, November and December.
Parks & trails →Of the yearly building losses FEMA expects in Discovery Harbour from natural hazards, earthquakes are the largest share (48%). Normals are averages; the hazards page covers the extremes.
Natural hazards →Discovery Harbour and similar climates
TownRatings has no climate map of the towns around Discovery Harbour yet.
Climates most like Discovery Harbour’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Discovery Harbour, HI | 54° | 78° | 21" | 0.0" |
| Palos Verdes Estates, CA | 50° | 78° | 13" | 0.0" |
| Poulsbo, WA | 35° | 75° | 33" | 3.0" |
| Tualatin, OR | 36° | 81° | 40" | 1.0" |
| Port Isabel, TX | 52° | 92° | 26" | 0.2" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
How Discovery Harbour compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Discovery Harbour’s place among Hawaii’s.
Discovery Harbour weather by month
Highs, lows and precipitation from the nearest NOAA station; snow, wet days and snow on the ground from S Kona 2 2.32, HI. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground |
|---|---|---|---|---|---|---|
| January | 75° | 54° | 2.7" | 0.0" | 7 | 0 |
| February | 75° | 54° | 1.8" | 0.0" | 8 | 0 |
| March | 75° | 55° | 2.5" | 0.0" | 10 | 0 |
| April | 76° | 56° | 1.3" | 0.0" | 9 | 0 |
| May | 76° | 58° | 1.4" | 0.0" | 11 | 0 |
| June | 77° | 59° | 0.9" | 0.0" | 10 | 0 |
| July | 78° | 60° | 1.3" | 0.0" | 11 | 0 |
| August | 79° | 60° | 1.6" | 0.0" | 9 | 0 |
| September | 79° | 60° | 2.2" | 0.0" | 13 | 0 |
| October | 79° | 59° | 1.9" | 0.0" | 10 | 0 |
| November | 78° | 58° | 1.6" | 0.0" | 8 | 0 |
| December | 77° | 56° | 2.1" | 0.0" | 7 | 0 |
| Year | 77° | 57° | 21.3" | 0.0" | 113 | 0 |
Where Discovery Harbour’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s 1991–2020 normals at the nearest station (NOAA’s grid doesn’t cover Hawaii).
- Snow: S Kona 2 2.32, HI.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Opihihale #2 24.1, HI, 23 miles from the town’s center, 320 ft higher; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Discovery Harbour’s climate
What is the weather like in Discovery Harbour?
A typical July afternoon reaches 78°, a January night drops to 54°, and snow is almost unheard of. Milder January nights than 98% of U.S. towns; cooler July afternoons than 96% of U.S. towns.
How cold does it get in Discovery Harbour in winter?
January nights average 54°. A night at 32° or below comes in only some winters (0.0 a year on average).
How much snow does Discovery Harbour get?
About 0.0 inches in a normal winter at S Kona 2 2.32, HI, so most winters see none.
How hot does it get in Discovery Harbour?
July, with a typical high of 78°. 90° days are rare: none in a normal year at Opihihale #2 24.1, HI.
When is the first and last frost in Discovery Harbour?
Most years have no frost at all: a 32° night comes in about 0% of winters at Opihihale #2 24.1, HI, usually in December or January.
What growing zone is Discovery Harbour in?
Zone 12b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 55°.
What is the best time of year to visit Discovery Harbour?
By one simple rule (highs of 62–84° and lows of 40° or more), January, February, March, April, May, June, July, August, September, October, November and December. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Neighbors talk weather
Gardens, snow, and the best days of the year in Discovery Harbour.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.