Kahului weather in May

In May, Kahului sees average daytime highs of 81°F and overnight lows near 72°F, with 0.5 in of rain across 3.3 wet days and about 13 hours of daylight. It is the 6th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 81°F through the month. The sky is clear or mostly clear about 41% of the time in May, and the air most often feels humid.

Daylight stretches from about 12 h 48 min at the start of May to 13 h 12 min by month's end. Set against the rest of the year, May is Kahului's 8th-clearest and 8th-windiest month. For the whole year in context, see Kahului's year-round climate.

Daytime high
81°
6th warmest
Overnight low
72°
6th coldest
Rainfall
0.5 in
3.3 wet days
Daylight
13 hours
5:52 AM – 6:52 PM
Cloud cover
47%
8th clearest
Wind
10 mph
8th windiest
Solar energy
6.75 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 May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 81°F through the month.

A typical May day in Kahului reaches about 81°F in the afternoon and slips back to 72°F overnight — a 9°F spread between the day's warmth and the night's chill. On most days the high lands between 78°F and 83°F. Set against its neighbours, May runs about 2°F warmer than April and about 2°F cooler than June.

65°70°75°80°85°151015202531
Avg high (°F)Avg low (°F)
18071
28071
38071
48071
58071
68071
78071
88071
98071
108071
118071
128071
138071
148071
158171
168172
178172
188172
198172
208172
218172
228172
238172
248172
258272
268272
278273
288273
298273
308273
318273

Kahului weather by month

How May compares with the rest of the year at a glance. May is the 6th-warmest and 9th-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 May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 29% of May, with mostly cloudy or overcast conditions the remaining 31%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16733
26733
36733
46733
56733
66634
76634
86535
96535
106535
116535
126634
136535
146634
156634
166832
176832
186931
197030
207030
217228
227228
237327
247426
257426
267525
277624
287624
297624
307624
317624

Chance of precipitation in May

Any precipitation

Kahului gets around 0.5 in of rain over 3.3 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 10% and peaks near 13% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)
113
213
313
413
513
613
713
813
913
1013
1113
1213
1312
1412
1511
1611
1710
1810
1910
209
219
229
238
248
258
267
277
287
297
307
316

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the humid band about 51% of days. Sticky, muggy-or-worse air turns up on roughly 44% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1960301
2959311
3958321
4957331
5858331
6857341
7856351
8855361
9854371
10754381
11753391
12653401
13652411
14553411
15552421
16551431
17451441
18451441
19450451
20350461
21349471
22349481
23248491
24247501
25246511
26145531
27144541
28143560
29142570
30141580
31140590

Wind in May

Winds average 10 mph in May.

Across May, daily wind ranges from about 10 mph on the calmest days to 10 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
110light breeze
210light breeze
310light breeze
410light breeze
510light breeze
610light breeze
710light breeze
810light breeze
910light breeze
1010light breeze
1110light 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
2510light breeze
2610light breeze
2710light breeze
2810light breeze
2910light breeze
3010light breeze
3110light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 48 min at the start of May to 13 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over May. Sunrise moves from 6:00 AM to 5:48 AM, and sunset from 6:46 PM to 6:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.86:006:46
212.86:006:46
312.85:596:47
412.85:596:47
512.85:586:47
612.85:576:48
712.95:576:48
812.95:566:49
912.95:566:49
1012.95:556:49
1112.95:556:50
1212.95:546:50
1312.95:546:51
1413.05:536:51
1513.05:536:51
1613.05:526:52
1713.05:526:52
1813.05:526:53
1913.05:516:53
2013.05:516:54
2113.15:516:54
2213.15:506:54
2313.15:506:55
2413.15:506:55
2513.15:496:56
2613.15:496:56
2713.15:496:57
2813.15:496:57
2913.15:496:57
3013.25:486:58
3113.25:486:58

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.75 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 — May's 6.75 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.6Intense
26.6Intense
36.6Intense
46.6Intense
56.6Intense
66.6Intense
76.6Intense
86.6Intense
96.6Intense
106.7Intense
116.7Intense
126.7Intense
136.7Intense
146.7Intense
156.7Intense
166.7Intense
176.7Intense
186.8Intense
196.8Intense
206.8Intense
216.8Intense
226.8Intense
236.8Intense
246.8Intense
256.8Intense
266.8Intense
276.9Intense
286.9Intense
296.9Intense
306.9Intense
316.9Intense
Planning a trip in May

Hazard calendar for Kahului

In seasonPeak

In May, Kahului sits inside its pacific hurricane season. The full year is below, with each hazard's peak months called out.

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 May a good time to visit Kahului?

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

7.7
Sightseeing
3rd-best month of the year
7.8
Beach & pool
6th-best month of the year

May 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 May

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

In May, Kahului sees daytime highs around 81°F and nights near 72°F. Pack light clothes and sun protection. About 3 days see rain.

light clothessun protection

Sea temperature near Kahului in May

The nearest coast averages about 77°F in May — 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 May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 10 (very high — sun protection essential). 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
May 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).