August weather forecast
Waipahu, HI

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Weather in August

In August, Waipahu, Hawaii weather sustains the warm pattern, experiencing the peak of the summer season. There is a negligible increase in the maximum temperature from the previous month, hitting 82°F (27.8°C). While the days continue to be warm and sunny, there is a slight increase in rainfall, bringing with it occasional cloudy weather. Despite this, the sea temperature remains inviting, making it a great month for water-based activities. The wind speed in August, recording at 14mph (22.5km/h), ensures that the summer heat does not become overpowering.

Temperature

Waipahu's temperatures tend to hit their maximum during August and September, with an average high-temperature of 82°F (27.8°C).

Heat index

The average heat index in August is appraised at a hot 87.8°F (31°C). When exposure and activity are sustained, they could induce fatigue, with a chance of heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is the outcome of merging air's temperature and its humidity metrics. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are largely significant for babies and toddlers. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.

Humidity

In August, the average relative humidity in Waipahu is 75%.

Rainfall

In Waipahu, in August, it is raining for 16.8 days, with typically 1.02" (26mm) of accumulated precipitation. Throughout the year, in Waipahu, there are 208.4 rainfall days, and 16.5" (419mm) of precipitation is accumulated.

Ocean temperature

In August, the average ocean temperature in Waipahu, Hawaii, is 79.7°F (26.5°C).
Note: Water temperature between 77°F (25°C) and 84.2°F (29°C) is perceived as agreeably warm, making all water activities enjoyable without the risk of discomfort over lengthy durations.

Daylight

The average length of the day in August is 12h and 50min.
On the first day of August, sunrise is at 6:05 am and sunset at 7:10 pm. On the last day of the month, sunrise is at 6:15 am and sunset at 6:48 pm HST.

Sunshine

In Waipahu, the average sunshine in August is 8.3h.

UV index

January through August, October through December, with an average maximum UV index of 6, are months with the lowest UV index in Waipahu. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The UV index of 6 in August translates into these instructions:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Take heed! Reflections of sand and water make the Sun's UV rays stronger.
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Frequently asked questions

What time of the year is the hottest in Waipahu?

Waipahu witnesses its highest temperatures in August and September, reaching an average of 82°F (27.8°C).

What is the average August temperature in Waipahu?

Waipahu in August has an average high-temperature of 82°F (27.8°C) and an average low-temperature of 74.8°F (23.8°C). In August, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, is appraised at 87.8°F (31°C).

What is the average humidity in August in Waipahu?

The average relative humidity in August in Waipahu, Hawaii, is 75%.

How much does it rain in Waipahu in August?

In Waipahu, during August, the rain falls for 16.8 days and regularly aggregates up to 1.02" (26mm) of precipitation.

What is the ocean temperature in August in Waipahu?

In Waipahu, in August, the average water temperature is 79.7°F (26.5°C). For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

What is the average length of the day in August in Waipahu?

In August, the average day length in Waipahu, Hawaii, is 12h and 50min.

When is the sunrise / sunset in August in Waipahu?

In August, on the first day of the month, sunrise is at 6:05 am and sunset at 7:10 pm. On the last day of the month, sunrise is at 6:15 am and sunset at 6:48 pm HST.

How long on average sun shines in August in Waipahu?

In Waipahu, Hawaii, the average sunshine duration in August is 8.3h.

What is the month with the lowest UV index in Waipahu?

January through August, October through December, with an average maximum UV index of 6, are months with the lowest UV index in Waipahu.

What is the UV index intensity in August in Waipahu?

The average daily maximum UV index in August is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Waipahu, HI

Average temperature in August - Waipahu, HI
  • Average high temperature in August: 82°F

The warmest months (with the highest average high temperature) are August and September (82°F).
The months with the lowest average high temperature are February and March (75.4°F).

  • Average low temperature in August: 74.8°F

The month with the highest average low temperature is September (75°F).
The coldest month (with the lowest average low temperature) is February (68°F).

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Average pressure in August
Waipahu, HI

Average pressure in August - Waipahu, HI
  • Average pressure in August: 29.98"Hg

The month with the highest atmospheric pressure is April (30.06"Hg).
The months with the lowest atmospheric pressure are September and October (29.97"Hg).

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Average wind speed in August
Waipahu, HI

Average wind speed in August - Waipahu, HI
  • Average wind speed in August: 10.6mph

The windiest month (with the highest average wind speed) is July (11.3mph).
The calmest month (with the lowest average wind speed) is January (8.4mph).

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Average humidity in August
Waipahu, HI

Average humidity in August - Waipahu, HI
  • Average humidity in August: 75%

The months with the highest relative humidity are February and December (76%).
The months with the lowest relative humidity are April, May, June and September (74%).

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Average rainfall in August
Waipahu, HI

Average rainfall in August - Waipahu, HI
  • Average rainfall in August: 1.02"

The wettest month (with the highest rainfall) is October (2.09").
The driest month (with the least rainfall) is July (0.71").

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Average rainfall days in August
Waipahu, HI

Average rainfall days in August - Waipahu, HI
  • Average rainfall days in August: 16.8 days

The month with the highest number of rainy days is March (20 days).
The month with the least rainy days is January (13.5 days).

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Average sea temperature in August
Waipahu, HI

Average sea temperature in August - Waipahu, HI
  • Average sea temperature in August: 79.6°F

The best month for swimming (with the highest average sea temperature) is September (80.6°F).
The coldest month (with the lowest average sea temperature) is March (75.7°F).

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Average daylight in August /
Average sunshine in August
Waipahu, HI

Average daylight in August / Average sunshine in August - Waipahu, HI
  • Average daylight in August: 12h and 5min

The month with the longest days is June (Average daylight: 13h and 24min).
The month with the shortest days is December (Average daylight: 10h and 54min).

  • Average sunshine in August: 8h and 2min

The month with the most sunshine is June (Average sunshine: 9h and 54min).
The months with the least sunshine are November and December (Average sunshine: 6h and 18min).

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Average sunshine days in August
Waipahu, HI

Average sunshine days in August - Waipahu, HI
  • Average sunshine days in August: 8.7 days

The month with the most sunshine days is January (12.3 days).
The month with the least sunshine days is November (6.2 days).

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Average UV index in August
Waipahu, HI

Average UV index in August - Waipahu, HI
  • Average UV index in August: 6

The month with the highest UV index is September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, October, November and December (UV index 6).

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Average cloud cover in August
Waipahu, HI

Average cloud cover in August - Waipahu, HI
  • Average cloud cover in August: 40

The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is January (Cloud cover 36).

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Average visibility in August
Waipahu, HI

Average visibility in August - Waipahu, HI
  • Average visibility in August: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Waipahu, Hawaii, USA

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