Hawai‘i Kai weather in January

In January, Hawai‘i Kai sees average daytime highs of 74°F and overnight lows near 72°F, with 1.4 in of rain across 4.9 wet days and about 10.8 hours of daylight. It is the 10th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 74°F through the month. The sky is clear or mostly clear about 67% of the time in January, and the air most often feels muggy.

Daylight stretches from about 10 h 42 min at the start of January to 11 hours by month's end. Set against the rest of the year, January is Hawai‘i Kai's 5th-clearest and 12th-windiest month. For the whole year in context, see Hawai‘i Kai's year-round climate.

Daytime high
74°
10th warmest
Overnight low
72°
3rd coldest
Rainfall
1.4 in
4.9 wet days
Daylight
10 h 48 min
7:15 AM – 6:05 PM
Cloud cover
34%
5th clearest
Wind
14 mph
12th windiest
Solar energy
4.42 kWh/m²
Travel score
8.2
out of 10

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 74°F through the month.

A typical January day in Hawai‘i Kai reaches about 74°F in the afternoon and slips back to 72°F overnight — a 3°F spread between the day's warmth and the night's chill. On most days the high lands between 72°F and 76°F. Set against its neighbours, January runs on par with December and on par with February.

65°70°75°80°151015202531
Avg high (°F)Avg low (°F)
17572
27572
37572
47472
57472
67472
77472
87472
97472
107472
117472
127472
137472
147472
157472
167472
177472
187472
197472
207472
217472
227472
237472
247471
257471
267471
277471
287471
297471
307471
317471

Hawai‘i Kai weather by month

How January compares with the rest of the year at a glance. January is the 10th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan74° / 72°1.44.910.88.2
Feb74° / 71°1.14.411.38.1
Mar74° / 71°1.54.411.88.2
Apr75° / 72°0.42.412.58.6
May76° / 74°0.52.2138.7
Jun77° / 75°0.31.113.38.8
Jul78° / 76°0.2113.28.7
Aug79° / 77°0.41.812.78.5
Sep79° / 77°0.42.212.18.4
Oct79° / 76°0.82.911.58.1
Nov77° / 75°1.64.9118.0
Dec75° / 73°1.95.210.78.2

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 67% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 15% of January, with mostly cloudy or overcast conditions the remaining 18%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18317
28317
38416
48416
58416
68416
78515
88515
98515
108515
118515
128515
138416
148317
158317
168218
178119
188119
198119
208020
218020
228020
238119
248119
258119
268119
278020
288020
298020
308020
318020

Chance of precipitation in January

Any precipitation

Hawai‘i Kai gets around 1.4 in of rain over 4.9 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 16% and peaks near 18% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
118
217
317
416
516
615
715
814
914
1014
1114
1214
1314
1414
1515
1615
1715
1816
1916
2016
2117
2217
2317
2417
2518
2618
2718
2818
2918
3018
3118

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January lands in the muggy band about 48% of days. Sticky, muggy-or-worse air turns up on roughly 49% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
111134522
211134522
311235502
411335492
511336492
611336481
711436481
811436471
921437471
1021437471
1121437461
1221437461
1321437461
1421437471
1521337471
1621337471
1721336471
1831336471
1931336481
2031336481
2131336481
2231336481
2321336481
2421336481
2521335481
2621335481
2721335482
2821435472
2921435472
3021435462
3131535462

Wind in January

Winds average 14 mph in January, the calmest month.

Across January, daily wind ranges from about 13 mph on the calmest days to 14 mph at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (mph)Feels
114breezy
214breezy
314breezy
414breezy
513breezy
613breezy
713breezy
813breezy
913breezy
1013breezy
1113breezy
1213breezy
1313breezy
1414breezy
1514breezy
1614breezy
1714breezy
1814breezy
1914breezy
2014breezy
2114breezy
2214breezy
2314breezy
2414breezy
2514breezy
2614breezy
2714breezy
2814breezy
2914breezy
3014breezy
3114breezy

Sunrise & sunset in January

DaylightNight

Daylight runs from about 10 h 42 min at the start of January to 11 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over January. Sunrise moves from 7:12 AM to 7:13 AM, and sunset from 5:56 PM to 6:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.77:125:56
210.77:135:56
310.77:135:57
410.77:135:57
510.77:135:58
610.87:145:59
710.87:145:59
810.87:146:00
910.87:146:01
1010.87:146:01
1110.87:156:02
1210.87:156:03
1310.87:156:03
1410.87:156:04
1510.87:156:04
1610.87:156:05
1710.87:156:06
1810.97:156:06
1910.97:156:07
2010.97:156:08
2110.97:156:08
2210.97:156:09
2310.97:156:10
2410.97:156:10
2510.97:156:11
2611.07:146:12
2711.07:146:12
2811.07:146:13
2911.07:146:14
3011.07:146:14
3111.07:136:15

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 4.42 kWh/m².

For context, solar energy here swings from a low near 4.29 kWh/m² to a high of 7.28 kWh/m² in June across the year — January's 4.42 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.4Bright
44.4Bright
54.4Bright
64.4Bright
74.4Bright
84.4Bright
94.4Bright
104.4Bright
114.4Bright
124.4Bright
134.4Bright
144.4Bright
154.4Bright
164.5Bright
174.5Bright
184.5Bright
194.5Bright
204.5Bright
214.5Bright
224.5Bright
234.5Bright
244.6Bright
254.6Bright
264.6Bright
274.6Bright
284.6Bright
294.7Bright
304.7Bright
314.7Bright
Planning a trip in January

Hazard calendar for Hawai‘i Kai

In seasonPeak

None of Hawai‘i Kai's seasonal hazards are active in January. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Hawai‘i Kai sits in the eastern Pacific hurricane zone; the season peaks August–September.

Pacific hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is January a good time to visit Hawai‘i Kai?

Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

8.2
Sightseeing
7th-best month of the year
6.7
Beach & pool
10th-best month of the year

January is one of the better times to visit Hawai‘i Kai for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Hawai‘i Kai in January

From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In January, Hawai‘i Kai sees daytime highs around 74°F and nights near 72°F. Worth packing: light clothes and a windbreaker. About 5 days see rain.

light clothesa windbreaker

Sea temperature near Hawai‘i Kai in January

The nearest coast averages about 76°F in January — 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 80°F and coldest in February near 75°F.

The water stays above 68°F all year — warm enough for a swim any month.

74°76°78°80°82°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmcomfortable to swim
Sea temperature (°F)Comfort
Jan76Warm
Feb75Refreshing
Mar75Refreshing
Apr76Warm
May77Warm
Jun78Warm
Jul79Warm
Aug80Warm
Sep80Warm
Oct80Warm
Nov79Warm
Dec77Warm

UV index in Hawai‘i Kai in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks 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 Hawai‘i Kai peaks around July 21 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 6 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highHighJul 21UV 12Dec 17UV 6
UV index (midday)Level
Jan7High
Feb9Very high
Mar10Extreme
Apr11Extreme
May10Extreme
Jun11Extreme
Jul12Extreme
Aug12Extreme
Sep12Extreme
Oct9Very high
Nov7High
Dec6High
Location & terrain

Where is Hawai‘i Kai?

Hawai‘i Kai sits at 21.3°N, 157.7°W, 10 ft above sea level, in United States. The nearest listed city is East Honolulu, 1.2 mi away.

Topography around Hawai‘i Kai

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Hawai‘i Kai.

Within 2 miles, the terrain around Hawai‘i Kai has significant variations in elevation — a maximum elevation change of 1,795 ft around an average of 318 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 3,117 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 3,983 ft.

The land around Hawai‘i Kai is covered by trees (32%), grassland (23%) and artificial surfaces (23%) within 2 miles, water (70%) within 10 miles, and water (86%) within 50 miles.

2 miles
1,795 ft
10 miles
3,117 ft
50 miles
3,983 ft
treesshrubsgrasslandartificial surfaceswater
January weather nearby: East Honolulu 1.2 mi · Niu Valley 2.5 mi · Kuliouou - Kalani Iki 2.5 mi · Kaimukī 6.2 mi · Manoa 6.8 mi · Diamond Head / Kapahulu / Saint Louis Heights 7.5 mi · Kailua 7.5 mi · Mō‘ili‘ili 8.1 mi

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
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

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 Hawai‘i Kai (21.2964°, -157.7018°, elevation 10 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).