Honolulu weather in August

In August, Honolulu sees average daytime highs of 79°F and overnight lows near 77°F, with 0.4 in of rain across 1.8 wet days and about 12.7 hours of daylight. It is the 2nd-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 79°F through the month. The sky is clear or mostly clear about 77% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 13 hours at the start of August to 12 h 24 min by month's end. Set against the rest of the year, August is Honolulu's 2nd-clearest and 3rd-windiest month. For the whole year in context, see Honolulu's year-round climate.

Daytime high
79°
2nd warmest
Overnight low
77°
11th coldest
Rainfall
0.4 in
1.8 wet days
Daylight
12 h 42 min
6:13 AM – 6:58 PM
Cloud cover
29%
2nd clearest
Wind
18 mph
3rd windiest
Solar energy
6.98 kWh/m²
Travel score
8.5
out of 10

Honolulu is capital city of the U.S. state of Hawaii and seat of Honolulu County.

Density
1,981/km²
people per km²
Founded
1907

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 79°F through the month.

A typical August day in Honolulu reaches about 79°F in the afternoon and slips back to 77°F overnight — a 2°F spread between the day's warmth and the night's chill. On most days the high lands between 78°F and 80°F. Set against its neighbours, August runs on par with July and on par with September.

65°70°75°80°85°151015202531
Avg high (°F)Avg low (°F)
17977
27977
37977
47977
57977
67977
77977
87977
97977
107977
117977
127977
137977
147977
157977
167977
177977
187977
197977
207977
217977
227977
237977
247977
257977
267977
277977
287977
297977
307977
317977

Honolulu weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 10th-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 August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 77% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 10% of August, with mostly cloudy or overcast conditions the remaining 13%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18614
28614
38614
48614
58713
68713
78614
88614
98614
108614
118713
128713
138713
148713
158713
168713
178812
188713
198713
208713
218713
228713
238713
248713
258614
268614
278614
288614
298614
308614
318614

Chance of precipitation in August

Any precipitation

Honolulu gets around 0.4 in of rain over 1.8 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 5% and peaks near 7% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
14
24
35
45
55
65
75
85
95
105
115
125
135
145
155
165
175
185
195
205
216
226
236
246
256
267
277
287
297
307
317

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the oppressive band about 55% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
147530
247530
346540
446540
546540
645550
745550
845550
944560
1044560
1144560
1244560
1343570
1443570
1543570
1643570
1743570
1844560
1944560
2044560
2145550
2245541
2345541
2446531
2546531
2646531
2747521
2847521
2947521
3047521
3147521

Wind in August

Winds average 18 mph in August.

Across August, daily wind ranges from about 17 mph on the calmest days to 18 mph at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (mph)Feels
118windy
218windy
318windy
418windy
518windy
618windy
718windy
818windy
918windy
1018windy
1118breezy
1218breezy
1318breezy
1418breezy
1518breezy
1618breezy
1718breezy
1818breezy
1918breezy
2018breezy
2117breezy
2217breezy
2317breezy
2417breezy
2517breezy
2617breezy
2717breezy
2817breezy
2917breezy
3017breezy
3117breezy

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 hours at the start of August to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over August. Sunrise moves from 6:08 AM to 6:18 AM, and sunset from 7:07 PM to 6:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.06:087:07
213.06:087:06
313.06:097:06
412.96:097:05
512.96:107:05
612.96:107:04
712.96:107:04
812.96:117:03
912.96:117:02
1012.86:117:02
1112.86:127:01
1212.86:127:00
1312.86:127:00
1412.86:136:59
1512.86:136:58
1612.76:136:58
1712.76:146:57
1812.76:146:56
1912.76:146:55
2012.76:156:55
2112.66:156:54
2212.66:156:53
2312.66:166:52
2412.66:166:51
2512.66:166:50
2612.56:176:49
2712.56:176:49
2812.56:176:48
2912.56:176:47
3012.56:186:46
3112.46:186:45

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.98 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 — August's 6.98 kWh/m² falls in the middle.

02468151015202531
Solar energy (kWh/m²)Level
17.1Intense
27.1Intense
37.1Intense
47.1Intense
57.1Intense
67.1Intense
77.1Intense
87.1Intense
97.1Intense
107.0Intense
117.0Intense
127.0Intense
137.0Intense
147.0Intense
157.0Intense
167.0Intense
177.0Intense
187.0Intense
197.0Intense
206.9Intense
216.9Intense
226.9Intense
236.9Intense
246.9Intense
256.9Intense
266.8Intense
276.8Intense
286.8Intense
296.8Intense
306.8Intense
316.8Intense
Planning a trip in August

Hazard calendar for Honolulu

In seasonPeak

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

Honolulu 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 August a good time to visit Honolulu?

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

8.5
Sightseeing
5th-best month of the year
8.2
Beach & pool
1st-best month of the year

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

What to pack for Honolulu in August

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

In August, Honolulu sees daytime highs around 79°F and nights near 77°F. Pack sun protection and a windbreaker. Worth having: light clothes.

sun protectiona windbreakerlight clothes

Sea temperature near Honolulu in August

The nearest coast averages about 80°F in August — 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 Honolulu in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Honolulu peaks around July 21 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highHighJul 21UV 12Dec 18UV 6
UV index (midday)Level
Jan7High
Feb9Very high
Mar10Extreme
Apr11Extreme
May10Extreme
Jun11Extreme
Jul12Extreme
Aug12Extreme
Sep12Extreme
Oct9Very high
Nov7High
Dec6High
Location & terrain

Where is Honolulu?

Honolulu sits at 21.3°N, 157.9°W, 16 ft above sea level, in United States. The nearest listed city is Ala Moana - Kakaʻako, 0.6 mi away.

Topography around Honolulu

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

Within 2 miles, the terrain around Honolulu has significant variations in elevation — a maximum elevation change of 860 ft around an average of 72 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 Honolulu is covered by artificial surfaces (51%) and water (28%) within 2 miles, water (47%) and trees (30%) within 10 miles, and water (87%) within 50 miles.

2 miles
860 ft
10 miles
3,117 ft
50 miles
3,983 ft
treesgrasslandartificial surfacesbare terrainwater
August weather nearby: Ala Moana - Kakaʻako 0.6 mi · Kalihi-Palama 1.9 mi · Makiki / Lower Punchbowl / Tantalus 1.9 mi · McCully - Moiliili 1.9 mi · Mō‘ili‘ili 1.9 mi · Waikīkī 1.9 mi · Liliha - Kapalama 1.9 mi · Nuuanu - Punchbowl 3.1 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 Honolulu (21.3069°, -157.8583°, elevation 16 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).