Kahului weather in December

In December, Kahului sees average daytime highs of 78°F and overnight lows near 70°F, with 1.6 in of rain across 5.2 wet days and about 10.8 hours of daylight. It is the 9th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 78°F through the month. The sky is clear or mostly clear about 52% of the time in December, and the air most often feels humid.

Daylight stretches from about 10 h 48 min at the start of December to 10 h 42 min by month's end. Set against the rest of the year, December is Kahului's 4th-clearest and 7th-windiest month. For the whole year in context, see Kahului's year-round climate.

Daytime high
78°
9th warmest
Overnight low
70°
5th coldest
Rainfall
1.6 in
5.2 wet days
Daylight
10 h 42 min
7:00 AM – 5:44 PM
Cloud cover
44%
4th clearest
Wind
10 mph
7th windiest
Solar energy
4.12 kWh/m²
Travel score
7.7
out of 10

Kahului is census designated place in Maui County, Hawaii, United States.

Density
632/km²
people per km²

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 78°F through the month.

A typical December day in Kahului reaches about 78°F in the afternoon and slips back to 70°F overnight — a 8°F spread between the day's warmth and the night's chill. On most days the high lands between 75°F and 81°F. Set against its neighbours, December runs about 2°F cooler than November and on par with January.

60°70°80°151015202531
Avg high (°F)Avg low (°F)
17971
27971
37971
47971
57971
67971
77971
87971
97971
107971
117871
127870
137870
147870
157870
167870
177870
187870
197870
207870
217870
227870
237870
247870
257870
267870
277869
287869
297869
307869
317869

Kahului weather by month

How December compares with the rest of the year at a glance. December is the 9th-warmest and 2nd-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 December

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 21% of December, with mostly cloudy or overcast conditions the remaining 27%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16535
26733
36733
46832
56832
67030
77030
87129
97327
107327
117426
127525
137525
147525
157525
167624
177624
187624
197624
207624
217624
227624
237624
247525
257525
267525
277525
287525
297624
307624
317624

Chance of precipitation in December

Any precipitation

Kahului gets around 1.6 in of rain over 5.2 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 17% and peaks near 19% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
116
216
316
416
516
616
716
815
915
1015
1115
1215
1315
1415
1515
1616
1716
1816
1916
2016
2117
2217
2317
2418
2518
2618
2719
2819
2919
3019
3119

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the humid band about 49% of days. Sticky, muggy-or-worse air turns up on roughly 41% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1643483
2743473
3744463
4745452
5845452
6846442
7946432
8947431
9947421
101048411
111048411
121049401
131049401
141050400
151051390
161051390
171051390
181051390
191052380
201052380
211051381
221051381
231150381
241150381
251151371
261250371
271350361
281450361
291549351
301649341
311749331

Wind in December

Winds average 10 mph in December.

Across December, daily wind ranges from about 9 mph on the calmest days to 11 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
1210light breeze
1310light breeze
1410light breeze
1510light breeze
1610light breeze
1710light breeze
1810light breeze
1910light breeze
2010light breeze
2110light breeze
2210light breeze
2310light breeze
2410light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze
319light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 10 h 48 min at the start of December to 10 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over December. Sunrise moves from 6:51 AM to 7:07 AM, and sunset from 5:40 PM to 5:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.86:515:40
210.86:525:40
310.86:525:41
410.86:535:41
510.86:535:41
610.86:545:41
710.86:555:41
810.86:555:42
910.86:565:42
1010.86:575:42
1110.86:575:42
1210.86:585:43
1310.76:585:43
1410.76:595:43
1510.76:595:44
1610.77:005:44
1710.77:005:45
1810.77:015:45
1910.77:015:45
2010.77:025:46
2110.77:025:46
2210.77:035:47
2310.77:035:47
2410.77:045:48
2510.77:045:48
2610.77:055:49
2710.77:055:49
2810.77:065:50
2910.77:065:50
3010.77:065:51
3110.77:075:51

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.12 kWh/m² — the year's lowest.

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 — December's 4.12 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.1Bright
24.0Bright
34.0Bright
44.0Bright
54.0Bright
64.0Bright
74.0Bright
84.0Bright
94.0Bright
104.0Bright
114.0Bright
124.0Bright
134.0Bright
144.0Bright
154.0Bright
164.0Bright
174.0Bright
184.0Bright
194.0Bright
204.1Bright
214.1Bright
224.1Bright
234.1Bright
244.1Bright
254.2Bright
264.2Bright
274.2Bright
284.2Bright
294.2Bright
304.3Bright
314.3Bright
Planning a trip in December

Hazard calendar for Kahului

In seasonPeak

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

Kahului 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 December a good time to visit Kahului?

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

7.7
Sightseeing
3rd-best month of the year
7.3
Beach & pool
9th-best month of the year

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

What to pack for Kahului in December

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

In December, Kahului sees daytime highs around 78°F and nights near 70°F. Worth packing: light clothes. About 5 days see rain.

light clothes

Sea temperature near Kahului in December

The nearest coast averages about 77°F in December — 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
Jul78Warm
Aug80Warm
Sep80Warm
Oct80Warm
Nov79Warm
Dec77Warm

UV index in Kahului in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December 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 Kahului 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 Kahului?

Kahului sits at 20.9°N, 156.5°W, 0 ft above sea level, in United States. The nearest listed city is Wailuku, 1.9 mi away.

Topography around Kahului

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

Within 2 miles, the terrain around Kahului has only modest variations in elevation — a maximum elevation change of 328 ft around an average of 66 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 Kahului is covered by artificial surfaces (42%), water (27%) and grassland (22%) within 2 miles, grassland (41%) and water (34%) within 10 miles, and water (82%) within 50 miles.

2 miles
328 ft
10 miles
5,751 ft
50 miles
9,977 ft
treesshrubsgrasslandartificial surfacesbare terrainwater
December weather nearby: Wailuku 1.9 mi · Kīhei 8.7 mi · Lahaina 14 mi · Hawai‘i Kai 84 mi · East Honolulu 85 mi · Niu Valley 86 mi · Kuliouou - Kalani Iki 87 mi · Kailua 89 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 Kahului (20.8893°, -156.4729°, elevation 0 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).