Koolauloa weather in April

In April, Koolauloa sees average daytime highs of 78°F and overnight lows near 69°F, with 1.0 in of rain across 8.4 wet days and about 12.5 hours of daylight. It is the 8th-warmest and 8th-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 28% of the time in April, and the air most often feels humid.

Daylight stretches from about 12 h 12 min at the start of April to 12 h 48 min by month's end. Set against the rest of the year, April is Koolauloa's 12th-clearest and 4th-windiest month. For the whole year in context, see Koolauloa's year-round climate.

Daytime high
78°
8th warmest
Overnight low
69°
4th coldest
Rainfall
1.0 in
8.4 wet days
Daylight
12 h 30 min
6:17 AM – 6:47 PM
Cloud cover
56%
12th clearest
Wind
11 mph
4th windiest
Solar energy
6.73 kWh/m²
Travel score
7.0
out of 10

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

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

A typical April day in Koolauloa reaches about 78°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 75°F and 81°F. Set against its neighbours, April runs about 1°F warmer than March and about 2°F cooler than May.

60°70°80°151015202530
Avg high (°F)Avg low (°F)
17768
27769
37769
47769
57769
67769
77769
87769
97769
107869
117869
127869
137869
147869
157869
167869
177869
187869
197869
207869
217869
227869
237869
247869
257869
267869
277869
287869
297869
307869

Koolauloa weather by month

How April compares with the rest of the year at a glance. April is the 8th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan76° / 67°1.67.310.87.6
Feb76° / 67°1.5711.37.5
Mar76° / 68°2.18.911.87.2
Apr78° / 69°1.08.412.57.0
May80° / 70°1.18137.0
Jun82° / 72°0.97.313.36.9
Jul82° / 73°0.87.813.26.6
Aug83° / 74°0.96.812.76.3
Sep83° / 74°0.8712.16.3
Oct82° / 73°1.37.211.56.7
Nov79° / 71°1.87.7117.0
Dec77° / 69°1.97.210.77.4

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in April, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 31% of April, with mostly cloudy or overcast conditions the remaining 41%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16238
26238
36238
46139
56139
66040
76040
86040
95941
105842
115842
125842
135842
145842
155842
165842
175941
185941
195941
206040
216040
226040
235941
245941
255941
265941
275842
285842
295842
305743

Chance of precipitation in April

Any precipitation

Koolauloa gets around 1.0 in of rain over 8.4 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 28% and peaks near 30% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
129
229
329
429
529
629
729
829
929
1029
1129
1229
1329
1429
1530
1629
1729
1829
1929
2028
2128
2228
2327
2427
2527
2627
2727
2827
2927
3027

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the humid band about 56% of days. Sticky, muggy-or-worse air turns up on roughly 31% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
121456271
221456271
311358271
411357281
511357281
611356291
711356291
811355301
911355301
1011354311
1111255311
1211256310
1311256310
1411156320
1511156320
1611156320
1711156320
1811057320
1911058310
2011058310
2111058310
2221057310
2321057310
2421057310
2521056320
2621056320
2721056320
2821056320
2921055330
3021055330

Wind in April

Winds average 11 mph in April.

Across April, daily wind ranges from about 11 mph on the calmest days to 12 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (mph)Feels
111light breeze
211light breeze
311light breeze
411light breeze
511light breeze
611light breeze
711light breeze
811light breeze
911light breeze
1011light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1911light breeze
2011light breeze
2111light breeze
2211light breeze
2311light breeze
2411light breeze
2511light breeze
2611light breeze
2711light breeze
2811light breeze
2911light breeze
3011light breeze

Sunrise & sunset in April

DaylightNight

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

Days grow by about 36 minutes over April. Sunrise moves from 6:31 AM to 6:06 AM, and sunset from 6:42 PM to 6:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:316:42
212.26:306:42
312.26:296:43
412.26:286:43
512.36:276:43
612.36:266:44
712.36:256:44
812.36:246:44
912.46:236:44
1012.46:226:45
1112.46:216:45
1212.46:216:45
1312.46:206:46
1412.56:196:46
1512.56:186:46
1612.56:176:47
1712.56:166:47
1812.56:156:48
1912.66:146:48
2012.66:146:48
2112.66:136:49
2212.66:126:49
2312.66:116:49
2412.76:106:50
2512.76:106:50
2612.76:096:50
2712.76:086:51
2812.76:076:51
2912.76:076:52
3012.86:066:52

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 6.73 kWh/m².

For context, solar energy here swings from a low near 4.24 kWh/m² to a high of 7.21 kWh/m² in June across the year — April's 6.73 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.4Intense
26.4Intense
36.5Intense
46.5Intense
56.5Intense
66.5Intense
76.5Intense
86.6Intense
96.6Intense
106.6Intense
116.6Intense
126.7Intense
136.7Intense
146.7Intense
156.7Intense
166.7Intense
176.8Intense
186.8Intense
196.8Intense
206.8Intense
216.8Intense
226.8Intense
236.9Intense
246.9Intense
256.9Intense
266.9Intense
276.9Intense
286.9Intense
296.9Intense
306.9Intense
Planning a trip in April

Hazard calendar for Koolauloa

In seasonPeak

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

Koolauloa 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 April a good time to visit Koolauloa?

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

7.0
Sightseeing
5th-best month of the year
6.5
Beach & pool
10th-best month of the year

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

What to pack for Koolauloa in April

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

In April, Koolauloa sees daytime highs around 78°F and nights near 69°F. Pack sun protection. Worth having: light clothes and rain gear. About 8 days see rain.

sun protectionlight clothesrain gear

Sea temperature near Koolauloa in April

The nearest coast averages about 76°F in April — 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
Jan75Warm
Feb75Refreshing
Mar75Refreshing
Apr76Warm
May77Warm
Jun78Warm
Jul78Warm
Aug79Warm
Sep80Warm
Oct80Warm
Nov79Warm
Dec77Warm

UV index in Koolauloa in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Koolauloa peaks around July 23 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 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 23UV 12Dec 19UV 6
UV index (midday)Level
Jan6High
Feb9Very high
Mar10Extreme
Apr11Extreme
May10Very high
Jun11Extreme
Jul12Extreme
Aug12Extreme
Sep12Extreme
Oct9Very high
Nov7High
Dec6High
Location & terrain

Where is Koolauloa?

Koolauloa sits at 21.6°N, 157.9°W, 640 ft above sea level, in United States. The nearest listed city is Wahiawā, 9.3 mi away.

Topography around Koolauloa

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

Within 2 miles, the terrain around Koolauloa has large variations in elevation — a maximum elevation change of 2,434 ft around an average of 722 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,828 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 3,983 ft.

The land around Koolauloa is covered by trees (79%) within 2 miles, trees (47%) and water (44%) within 10 miles, and water (87%) within 50 miles.

2 miles
2,434 ft
10 miles
2,828 ft
50 miles
3,983 ft
treesshrubsgrasslandartificial surfaceswaterwetland
April weather nearby: Wahiawā 9.3 mi · Mililani Mauka / Launani Valley 9.3 mi · Wahiawā-Whitmore 9.9 mi · Mililani Mauka 9.9 mi · Schofield-Wheeler 11 mi · Schofield Barracks 12 mi · Mililani Town 12 mi · Waiau-Pacific Palisades 14 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 Koolauloa (21.6058°, -157.9265°, elevation 640 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).