Waipahu in Winter
In winter (December, January and February), Waipahu sees average daytime highs around 76°F and overnight lows near 68°F, with 5.0 in of rain over about 22 wet days across the season. It is the coldest season of the year and the wettest season of the year.
Across winter, daytime highs hold fairly steady around 76°F. The sky is clear or mostly clear about 41% of the time across winter, and the air most often feels humid.
Winter is Waipahu's best season of the year to visit on our travel score. Waipahu has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see Waipahu's year-round climate.
- Avg daytime high
- 76°F
- coldest season of the year
- Avg overnight low
- 68°F
- Rainfall
- 5.0 in
- 22 wet days
- Avg wind
- 10 mph
- Travel score
- 7.5
- best season of the year
- Months
- Dec · Jan · Feb
Temperature in Waipahu in Winter
Across winter, daytime highs hold fairly steady around 76°F.
A typical winter day in Waipahu reaches about 76°F and drops to 68°F overnight. The warmest of the three months is December, the coolest February.
Waipahu weather by month
How the three winter months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 76° / 67° | 1.6 | 7.3 | 10.8 | 7.6 |
| Feb | 76° / 67° | 1.5 | 7 | 11.3 | 7.5 |
| Mar | 76° / 68° | 2.1 | 8.9 | 11.8 | 7.2 |
| Apr | 78° / 69° | 1.0 | 8.4 | 12.5 | 7.0 |
| May | 80° / 70° | 1.1 | 8 | 13 | 7.0 |
| Jun | 82° / 72° | 0.9 | 7.3 | 13.3 | 6.9 |
| Jul | 82° / 73° | 0.8 | 7.8 | 13.2 | 6.6 |
| Aug | 83° / 74° | 0.9 | 6.8 | 12.7 | 6.3 |
| Sep | 83° / 74° | 0.8 | 7 | 12.1 | 6.3 |
| Oct | 82° / 73° | 1.3 | 7.2 | 11.5 | 6.7 |
| Nov | 79° / 71° | 1.8 | 7.7 | 11 | 7.0 |
| Dec | 77° / 69° | 1.9 | 7.2 | 10.7 | 7.4 |
Cloud cover in Winter
The sky is clear or mostly clear about 41% of the time across winter.
Chance of precipitation in Winter
Waipahu gets around 5.0 in of rain over 22 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 10 mph across winter.
Sunrise & sunset in Winter
Daylight runs from about 10 h 48 min in early December to 11 h 30 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 4.6 kWh/m².
Hazard calendar for Waipahu
None of Waipahu's seasonal hazards peak in winter. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Waipahu sits in the eastern Pacific hurricane zone; the season peaks August–September.
Is winter a good time to visit Waipahu?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is one of the better times to visit Waipahu for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Waipahu in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Waipahu sees daytime highs around 76°F and nights near 68°F. Worth packing: light clothes and sun protection. About 22 days see rain.
Sea temperature near Waipahu in Winter
The nearest coast averages about 76°F across winter — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in September at about 81°F and coldest in February near 76°F.
The water stays above 68°F all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 76 | 76 | 76 | 76 | 77 | 78 | 79 | 80 | 81 | 80 | 79 | 77 |
| Comfort | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 76 | Warm |
| Feb | 76 | Warm |
| Mar | 76 | Warm |
| Apr | 76 | Warm |
| May | 77 | Warm |
| Jun | 78 | Warm |
| Jul | 79 | Warm |
| Aug | 80 | Warm |
| Sep | 81 | Warm |
| Oct | 80 | Warm |
| Nov | 79 | Warm |
| Dec | 77 | Warm |
UV index in Waipahu in Winter
Clear-sky midday UV across winter averages around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Waipahu peaks around July 21 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 6 (high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 7 | 9 | 10 | 11 | 10 | 11 | 12 | 12 | 12 | 9 | 7 | 6 |
| Level | High | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | High | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 7 | High |
| Feb | 9 | Very high |
| Mar | 10 | Extreme |
| Apr | 11 | Extreme |
| May | 10 | Extreme |
| Jun | 11 | Extreme |
| Jul | 12 | Extreme |
| Aug | 12 | Extreme |
| Sep | 12 | Extreme |
| Oct | 9 | Very high |
| Nov | 7 | High |
| Dec | 6 | High |
Where is Waipahu?
Waipahu sits at 21.4°N, 158.0°W, 62 ft above sea level, in United States. The nearest listed city is Pearl City, 2.5 mi away.
Topography around Waipahu
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Waipahu.
Within 2 miles, the terrain around Waipahu has only modest variations in elevation — a maximum elevation change of 463 ft around an average of 115 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 3,025 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 3,983 ft.
The land around Waipahu is covered by artificial surfaces (38%) and grassland (28%) within 2 miles, trees (36%), grassland (23%) and water (23%) within 10 miles, and water (87%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Waipahu (21.3867°, -158.0092°, elevation 62 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.