Wailuku weather in January

In January, Wailuku sees average daytime highs of 77°F and overnight lows near 69°F, with 1.4 in of rain across 5.6 wet days and about 10.9 hours of daylight. It is the 10th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 77°F through the month. The sky is clear or mostly clear about 56% of the time in January, and the air most often feels humid.

Daylight stretches from about 10 h 48 min at the start of January to 11 hours by month's end. Set against the rest of the year, January is Wailuku's 1st-clearest and 12th-windiest month. For the whole year in context, see Wailuku's year-round climate.

Daytime high
77°
10th warmest
Overnight low
69°
2nd coldest
Rainfall
1.4 in
5.6 wet days
Daylight
10 h 54 min
7:10 AM – 6:01 PM
Cloud cover
39%
1st clearest
Wind
9 mph
12th windiest
Solar energy
4.32 kWh/m²
Travel score
7.9
out of 10

Wailuku is census-designated place in Maui County, Hawaiʻi, United States.

Density
1,042/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 77°F through the month.

A typical January day in Wailuku reaches about 77°F in the afternoon and slips back to 69°F overnight — a 9°F spread between the day's warmth and the night's chill. On most days the high lands between 74°F and 80°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)
17869
27869
37869
47769
57769
67769
77769
87769
97769
107769
117769
127769
137769
147769
157769
167769
177769
187769
197769
207769
217769
227769
237769
247768
257768
267768
277768
287768
297768
307768
317768

Wailuku weather by month

How January compares with the rest of the year at a glance. January is the 10th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan77° / 69°1.45.610.97.9
Feb77° / 68°1.25.211.37.8
Mar77° / 69°1.86.711.97.5
Apr79° / 70°0.83.912.57.6
May81° / 72°0.53.3137.7
Jun82° / 73°0.21.913.27.6
Jul83° / 74°0.42.713.17.0
Aug84° / 75°0.52.712.76.8
Sep84° / 75°0.42.212.16.8
Oct83° / 74°0.73.211.57.0
Nov80° / 72°1.05117.4
Dec78° / 70°1.65.210.87.7

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 56% of the time in January, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 21% of January, with mostly cloudy or overcast conditions the remaining 23%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17723
27723
37723
47723
57822
67822
77921
87822
97921
107822
117921
127921
137822
147822
157723
167723
177723
187624
197624
207525
217624
227624
237723
247723
257624
267723
277723
287723
297723
307723
317723

Chance of precipitation in January

Any precipitation

Wailuku gets around 1.4 in of rain over 5.6 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 18% and peaks near 23% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
118
218
318
418
517
617
717
816
916
1015
1115
1215
1315
1415
1515
1615
1716
1816
1917
2018
2118
2219
2319
2420
2521
2621
2722
2822
2922
3023
3123

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 54% of days. Sticky, muggy-or-worse air turns up on roughly 23% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
11185031
21195030
31195129
41195228
51205227
61205326
71205425
82205424
92205523
102205523
112205622
122205622
133195721
143195721
153195721
163195721
173195721
183195622
193195622
204205422
214205422
224205422
233205522
244215322
254215322
264215322
274215322
284225123
294225123
305225023
315234923

Wind in January

Winds average 9 mph in January, the calmest month.

Across January, daily wind ranges from about 9 mph on the calmest days to 9 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
19light breeze
29light breeze
39light breeze
49light breeze
59light breeze
69light breeze
79light breeze
89light breeze
99light breeze
109light breeze
119light breeze
129light breeze
139light breeze
149light breeze
159light breeze
169light breeze
179light breeze
189light breeze
199light breeze
209light breeze
219light breeze
229light breeze
239light breeze
249light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze
319light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 10 h 48 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 12 minutes over January. Sunrise moves from 7:07 AM to 7:08 AM, and sunset from 5:52 PM to 6:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.87:075:52
210.87:075:52
310.87:075:53
410.87:085:53
510.87:085:54
610.87:085:55
710.87:085:55
810.87:095:56
910.87:095:57
1010.87:095:57
1110.87:095:58
1210.87:095:58
1310.87:095:59
1410.87:096:00
1510.87:096:00
1610.97:106:01
1710.97:106:02
1810.97:106:02
1910.97:106:03
2010.97:106:04
2110.97:106:04
2210.97:096:05
2310.97:096:06
2410.97:096:06
2511.07:096:07
2611.07:096:08
2711.07:096:08
2811.07:096:09
2911.07:086:09
3011.07:086:10
3111.07:086:11

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 4.32 kWh/m².

For context, solar energy here swings from a low near 4.12 kWh/m² to a high of 6.81 kWh/m² in June across the year — January's 4.32 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
134.3Bright
144.3Bright
154.3Bright
164.3Bright
174.4Bright
184.4Bright
194.4Bright
204.4Bright
214.4Bright
224.4Bright
234.4Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.5Bright
294.6Bright
304.6Bright
314.6Bright
Planning a trip in January

Hazard calendar for Wailuku

In seasonPeak

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

Wailuku 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 Wailuku?

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

7.9
Sightseeing
1st-best month of the year
7.2
Beach & pool
10th-best month of the year

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

What to pack for Wailuku in January

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

In January, Wailuku sees daytime highs around 77°F and nights near 69°F. Worth packing: light clothes. About 6 days see rain.

light clothes

Sea temperature near Wailuku 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
Feb75Warm
Mar75Warm
Apr76Warm
May77Warm
Jun78Warm
Jul79Warm
Aug80Warm
Sep80Warm
Oct80Warm
Nov79Warm
Dec77Warm

UV index in Wailuku 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 Wailuku peaks around July 22 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 22UV 12Dec 17UV 6
UV index (midday)Level
Jan7High
Feb9Very high
Mar11Extreme
Apr13Extreme
May10Extreme
Jun11Extreme
Jul12Extreme
Aug12Extreme
Sep12Extreme
Oct10Very high
Nov7High
Dec6High
Location & terrain

Where is Wailuku?

Wailuku sits at 20.9°N, 156.5°W, 249 ft above sea level, in United States. The nearest listed city is Kahului, 1.9 mi away.

Topography around Wailuku

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

Within 2 miles, the terrain around Wailuku has large variations in elevation — a maximum elevation change of 2,749 ft around an average of 522 ft above sea level; within 10 miles, very significant variations in elevation — a maximum elevation change of 5,751 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 9,977 ft.

The land around Wailuku is covered by trees (45%), artificial surfaces (30%) and grassland (20%) within 2 miles, grassland (38%), water (34%) and trees (21%) within 10 miles, and water (82%) within 50 miles.

2 miles
2,749 ft
10 miles
5,751 ft
50 miles
9,977 ft
treesshrubsgrasslandartificial surfacesbare terrainwater
January weather nearby: Kahului 1.9 mi · Kīhei 9.3 mi · Lahaina 11 mi · Hawai‘i Kai 82 mi · East Honolulu 83 mi · Niu Valley 84 mi · Kuliouou - Kalani Iki 85 mi · Kailua 87 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 Wailuku (20.8913°, -156.506°, elevation 249 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).