Photo: Farragutful · CC BY-SA 4.0Few U.S. towns have milder winter nights than Nanakuli
In July the day’s top temperature is typically 85°. Winter and summer sit 21° apart. Its yearly precipitation falls short of 89% of U.S. towns. Long walks are most pleasant from November to June, when afternoons reach 78–83°.
A year in Nanakuli at a glance
Each month’s typical high and low, and what it brings.
What stands out about Nanakuli’s climate
Compared with towns across the U.S., with Nanakuli’s place in Hawaii beside it.
What a year in Nanakuli 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 Makaha Ctry Club 800.3, HI, 6 miles from the town’s center, 230 ft higher.
The 2023 USDA map puts Nanakuli’s center in zone 12b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 57°. Plant labels use the zone; frost dates tell you when to plant.
90° days by month
Average days at 90° or more
About 22 inches of rain a year
December is the wettest month and July the driest. Rain falls on about 237 days a year. Snow is rare: about 0.0" in a normal year at Upper Wahiawa 874.3, HI, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Nanakuli
0% 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 Makaha Ctry Club 800.3, HI.
Living with Nanakuli’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, November and December.
Parks & trails →Of the yearly building losses FEMA expects in Nanakuli from natural hazards, river flooding is the largest share (44%). Normals are averages; the hazards page covers the extremes.
Natural hazards →Nanakuli and similar climates
TownRatings has no climate map of the towns around Nanakuli yet.
Climates most like Nanakuli’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 |
|---|---|---|---|---|
| Nanakuli, HI | 65° | 85° | 22" | 0.0" |
| Topanga, CA | 48° | 84° | 20" | 0.0" |
| Port Isabel, TX | 52° | 92° | 26" | 0.2" |
| Key West, FL | 65° | 90° | 42" | 0.0" |
| Green, OR | 37° | 86° | 32" | 0.0" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
How Nanakuli compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Nanakuli’s place among Hawaii’s.
Nanakuli weather by month
Highs, lows and precipitation from the nearest NOAA station; snow, wet days and snow on the ground from Upper Wahiawa 874.3, HI. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground |
|---|---|---|---|---|---|---|
| January | 79° | 65° | 3.2" | 0.0" | 17 | 0 |
| February | 78° | 64° | 2.3" | 0.0" | 15 | 0 |
| March | 79° | 65° | 2.7" | 0.0" | 17 | 0 |
| April | 80° | 66° | 1.4" | 0.0" | 22 | 0 |
| May | 82° | 68° | 1.6" | 0.0" | 18 | 0 |
| June | 83° | 69° | 0.8" | 0.0" | 22 | 0 |
| July | 85° | 70° | 0.5" | 0.0" | 23 | 0 |
| August | 86° | 70° | 0.7" | 0.0" | 20 | 0 |
| September | 85° | 70° | 0.9" | 0.0" | 19 | 0 |
| October | 85° | 70° | 1.9" | 0.0" | 22 | 0 |
| November | 82° | 69° | 2.5" | 0.0" | 22 | 0 |
| December | 80° | 67° | 3.2" | 0.0" | 20 | 0 |
| Year | 82° | 68° | 21.8" | 0.0" | 237 | 0 |
Where Nanakuli’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: Upper Wahiawa 874.3, HI.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Makaha Ctry Club 800.3, HI, 6 miles from the town’s center, 230 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 Nanakuli’s climate
What is the weather like in Nanakuli?
A typical July afternoon reaches 85°, a January night drops to 65°, and snow is almost unheard of. Milder January nights than all but 32 U.S. towns; cooler July afternoons than 51% of U.S. towns.
How cold does it get in Nanakuli in winter?
February nights average 64°. A night at 32° or below comes in only some winters (0.0 a year on average).
How much snow does Nanakuli get?
About 0.0 inches in a normal winter at Upper Wahiawa 874.3, HI, so most winters see none.
How hot does it get in Nanakuli?
July, with a typical high of 85° and a low of 70°. About 1 days a year reach 90° (Makaha Ctry Club 800.3, HI).
When is the first and last frost in Nanakuli?
Most years have no frost at all: a 32° night comes in about 0% of winters at Makaha Ctry Club 800.3, HI, usually in December or January.
What growing zone is Nanakuli in?
Zone 12b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 57°.
What is the best time of year to visit Nanakuli?
By one simple rule (highs of 62–84° and lows of 40° or more), January, February, March, April, May, June, 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 Nanakuli.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.