Kailua weather in July

In July, Kailua sees average daytime highs of 80°F and overnight lows near 74°F, with 1.2 in of rain across 10.8 wet days and about 13.2 hours of daylight. It is the 4th-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 80°F through the month. The sky is clear or mostly clear about 55% of the time in July, and the air most often feels muggy.

Daylight stretches from about 13 h 18 min at the start of July to 13 hours by month's end. Set against the rest of the year, July is Kailua's 5th-clearest and 1st-windiest month. For the whole year in context, see Kailua's year-round climate.

Daytime high
80°
4th warmest
Overnight low
74°
10th coldest
Rainfall
1.2 in
10.8 wet days
Daylight
13 h 12 min
6:01 AM – 7:12 PM
Cloud cover
43%
5th clearest
Wind
15 mph
1st windiest
Solar energy
7.06 kWh/m²
Travel score
6.8
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 July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 80°F through the month.

A typical July day in Kailua reaches about 80°F in the afternoon and slips back to 74°F overnight — a 5°F spread between the day's warmth and the night's chill. On most days the high lands between 78°F and 81°F. Set against its neighbours, July runs on par with June and on par with August.

65°70°75°80°85°151015202531
Avg high (°F)Avg low (°F)
17974
27974
37974
47974
57974
67974
77974
87974
97974
107974
118074
128074
138074
148074
158074
168074
178074
188074
198074
208075
218075
228075
238075
248075
258075
268075
278075
288075
298075
308075
318075

Kailua weather by month

How July compares with the rest of the year at a glance. July is the 4th-warmest and 11th-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 July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 55% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 25% of July, with mostly cloudy or overcast conditions the remaining 20%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18020
28020
38020
48020
58020
67921
77921
87921
97921
107921
117921
127921
137921
147921
157921
167921
177921
188020
198020
208119
218119
228119
238218
248218
258119
268119
278119
288119
298119
308119
318119

Chance of precipitation in July

Any precipitation

Kailua gets around 1.2 in of rain over 10.8 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 34% and peaks near 37% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
134
233
333
432
532
632
732
833
933
1034
1134
1235
1335
1436
1536
1636
1737
1837
1937
2037
2137
2237
2336
2436
2535
2635
2734
2833
2933
3032
3131

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the muggy band about 71% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)
158114
258015
358015
457916
557817
657817
747818
847719
947719
1047620
1147521
1237522
1337423
1437324
1537225
1637126
1736928
1836829
1926830
2026731
2126632
2226533
2326434
2426434
2516435
2616435
2716336
2816336
2916336
3016336
3116336

Wind in July

Winds average 15 mph in July, the windiest month of the year.

Across July, daily wind ranges from about 14 mph on the calmest days to 15 mph at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (mph)Feels
114breezy
214breezy
314breezy
414breezy
514breezy
615breezy
715breezy
815breezy
915breezy
1015breezy
1115breezy
1215breezy
1315breezy
1415breezy
1515breezy
1615breezy
1715breezy
1815breezy
1915breezy
2015breezy
2115breezy
2215breezy
2315breezy
2415breezy
2515breezy
2615breezy
2715breezy
2815breezy
2915breezy
3015breezy
3115breezy

Sunrise & sunset in July

DaylightNight

Daylight runs from about 13 h 18 min at the start of July to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over July. Sunrise moves from 5:56 AM to 6:07 AM, and sunset from 7:13 PM to 7:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:567:13
213.35:567:13
313.35:567:13
413.35:577:13
513.35:577:13
613.35:577:13
713.35:587:13
813.35:587:13
913.25:587:13
1013.25:597:13
1113.25:597:13
1213.25:597:13
1313.26:007:13
1413.26:007:13
1513.26:017:12
1613.26:017:12
1713.26:017:12
1813.26:027:12
1913.26:027:12
2013.16:037:11
2113.16:037:11
2213.16:037:11
2313.16:047:10
2413.16:047:10
2513.16:057:10
2613.16:057:09
2713.16:057:09
2813.06:067:09
2913.06:067:08
3013.06:077:08
3113.06:077:07

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 7.06 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 — July's 7.06 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.1Intense
27.1Intense
37.1Intense
47.1Intense
57.1Intense
67.1Intense
77.1Intense
87.1Intense
97.1Intense
107.1Intense
117.1Intense
127.1Intense
137.1Intense
147.1Intense
157.1Intense
167.1Intense
177.1Intense
187.0Intense
197.0Intense
207.0Intense
217.0Intense
227.0Intense
237.0Intense
247.0Intense
257.0Intense
267.0Intense
277.0Intense
287.0Intense
297.0Intense
307.0Intense
317.0Intense
Planning a trip in July

Hazard calendar for Kailua

In seasonPeak

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

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 July a good time to visit Kailua?

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

6.8
Sightseeing
10th-best month of the year
6.7
Beach & pool
4th-best month of the year

July is a reasonable time to visit Kailua for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Kailua in July

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

In July, Kailua sees daytime highs around 80°F and nights near 74°F. Pack sun protection. Worth having: light clothes, rain gear and a windbreaker. About 11 days see rain.

sun protectionlight clothesrain geara windbreaker

Sea temperature near Kailua in July

The nearest coast averages about 79°F in July — 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 July

LowModerateHighVery highExtreme

Clear-sky midday UV in July 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 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
July 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).