Kailua weather in January

In January, Kailua sees average daytime highs of 75°F and overnight lows near 69°F, with 1.7 in of rain across 8.2 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 75°F through the month. The sky is clear or mostly clear about 52% of the time in January, and the air most often feels humid.

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 Kailua's 4th-clearest and 12th-windiest month. For the whole year in context, see Kailua's year-round climate.

Daytime high
75°
10th warmest
Overnight low
69°
3rd coldest
Rainfall
1.7 in
8.2 wet days
Daylight
10 h 48 min
7:15 AM – 6:05 PM
Cloud cover
42%
4th clearest
Wind
11 mph
12th windiest
Solar energy
4.34 kWh/m²
Travel score
7.6
out of 10

Kailua is census designated place in Honolulu County, Hawaii, United States.

Density
1,411/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 75°F through the month.

A typical January day in Kailua reaches about 75°F in the afternoon and slips back to 69°F overnight — a 6°F spread between the day's warmth and the night's chill. On most days the high lands between 72°F and 77°F. Set against its neighbours, January runs on par with December and on par with February.

60°70°80°151015202531
Avg high (°F)Avg low (°F)
17570
27570
37570
47570
57570
67570
77569
87569
97569
107569
117569
127569
137569
147569
157569
167569
177569
187569
197569
207569
217569
227569
237569
247569
257569
267469
277469
287469
297469
307469
317469

Kailua 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
Jan75° / 69°1.78.210.87.6
Feb74° / 69°1.78.211.37.3
Mar74° / 69°2.310.711.87.0
Apr76° / 70°1.210.812.57.0
May77° / 72°1.38.9137.2
Jun79° / 73°1.210.413.36.9
Jul80° / 74°1.210.813.26.8
Aug80° / 75°1.29.512.76.9
Sep81° / 75°1.19.212.16.9
Oct80° / 74°1.51011.56.8
Nov78° / 73°2.311.3116.7
Dec76° / 71°2.310.610.77.1

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 52% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 25% of January, with mostly cloudy or overcast conditions the remaining 23%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17723
27723
37822
47822
57822
68020
78020
88020
98119
108119
118119
128020
138020
147921
157822
167723
177723
187624
197624
207525
217525
227525
237525
247525
257525
267525
277525
287525
297525
307525
317525

Chance of precipitation in January

Any precipitation

Kailua gets around 1.7 in of rain over 8.2 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 26% and peaks near 30% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
130
229
328
428
527
626
725
825
924
1024
1123
1223
1323
1423
1524
1624
1724
1825
1925
2026
2126
2227
2327
2428
2528
2628
2729
2829
2929
3030
3130

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the humid band about 42% of days. Sticky, muggy-or-worse air turns up on roughly 38% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
121340431
221441421
321541411
421542401
531642391
631642381
731642380
831743370
931743370
1031743370
1131743370
1231743370
1341743360
1441743370
1541743370
1641743370
1741642370
1841642370
1941742370
2041742370
2141742370
2241742380
2341741380
2431741380
2531741380
2641741380
2741741380
2841741370
2941741371
3041840371
3151840371

Wind in January

Winds average 11 mph in January, the calmest month.

Across January, daily wind ranges from about 11 mph on the calmest days to 12 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
111light breeze
211light breeze
311light breeze
411light breeze
511light breeze
611light breeze
711light breeze
811light breeze
911light breeze
1011light breeze
1111light breeze
1211light breeze
1311light breeze
1411light breeze
1511light breeze
1611light breeze
1711light breeze
1811light breeze
1911light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze
3112light breeze

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 7:13 AM to 7:14 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)
110.77:135:56
210.77:135:56
310.77:135:57
410.77:135:57
510.77:145:58
610.77:145:59
710.87:145:59
810.87:146:00
910.87:156:01
1010.87:156:01
1110.87:156:02
1210.87:156:02
1310.87:156:03
1410.87:156:04
1510.87:156:04
1610.87:156:05
1710.87:156:06
1810.87:156:06
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
2610.97:156:12
2711.07:156:12
2811.07:146:13
2911.07:146:14
3011.07:146:14
3111.07:146:15

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 4.34 kWh/m².

For context, solar energy here swings from a low near 4.19 kWh/m² to a high of 7.18 kWh/m² in June across the year — January's 4.34 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
14.3Bright
24.3Bright
34.3Bright
44.3Bright
54.3Bright
64.3Bright
74.3Bright
84.3Bright
94.3Bright
104.3Bright
114.3Bright
124.3Bright
134.4Bright
144.4Bright
154.4Bright
164.4Bright
174.4Bright
184.4Bright
194.4Bright
204.4Bright
214.4Bright
224.4Bright
234.5Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.6Bright
294.6Bright
304.6Bright
314.6Bright
Planning a trip in January

Hazard calendar for Kailua

In seasonPeak

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

Kailua 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 Kailua?

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

7.6
Sightseeing
1st-best month of the year
6.3
Beach & pool
7th-best month of the year

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

What to pack for Kailua in January

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

In January, Kailua sees daytime highs around 75°F and nights near 69°F. Worth packing: light clothes and rain gear. About 8 days see rain.

light clothesrain gear

Sea temperature near Kailua 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 Kailua in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Kailua peaks around July 22 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighJul 22UV 12Dec 18UV 6
UV index (midday)Level
Jan6High
Feb8Very high
Mar10Extreme
Apr11Extreme
May10Very high
Jun11Extreme
Jul12Extreme
Aug12Extreme
Sep12Extreme
Oct9Very high
Nov7High
Dec6High
Location & terrain

Where is Kailua?

Kailua sits at 21.4°N, 157.7°W, 33 ft above sea level, in United States. The nearest listed city is Kaneohe, 3.7 mi away.

Topography around Kailua

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Kailua.

Within 2 miles, the terrain around Kailua has only modest variations in elevation — a maximum elevation change of 545 ft around an average of 39 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 Kailua is covered by water (33%) and artificial surfaces (26%) within 2 miles, water (56%) and trees (27%) within 10 miles, and water (86%) within 50 miles.

2 miles
545 ft
10 miles
3,117 ft
50 miles
3,983 ft
treesshrubsgrasslandartificial surfaceswaterwetland
January weather nearby: Kaneohe 3.7 mi · Nuuanu - Punchbowl 6.8 mi · Kalihi Valley 6.8 mi · Manoa 7.5 mi · Kuliouou - Kalani Iki 7.5 mi · Hawai‘i Kai 7.5 mi · East Honolulu 8.1 mi · Niu Valley 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 Kailua (21.4024°, -157.7405°, elevation 33 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).