August weather forecast
Waikapu, HI

Weather in August

The last month of the summer, August, is another warm month in Waikapu, Hawaii, with temperature in the range of an average low of 76.3°F (24.6°C) and an average high of 79.5°F (26.4°C).

Temperature

In Waikapu, the average high-temperature in August is almost the same as in July - a still moderately hot 79.5°F (26.4°C). In Waikapu, the average low-temperature is 76.3°F (24.6°C).

Humidity

July and August, with an average relative humidity of 76%, are most humid months.

Rainfall

In August, the rain falls for 8.7 days. Throughout August, 0.43" (11mm) of precipitation is accumulated. In Waikapu, during the entire year, the rain falls for 103.4 days and collects up to 6.57" (167mm) of precipitation.

Daylight

The average length of the day is 12.8h.

Sunshine

In August, the average sunshine in Waikapu is 9.2h.

UV index

Months with the highest UV index are July through October, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to the UV radiation for average individuals.
Note: In August, the average maximum UV index of 7 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What are the most humid months in Waikapu?

July and August, with an average relative humidity of 76%, are most humid months in Waikapu.

What is the average humidity in August in Waikapu?

In Waikapu, Hawaii, the average relative humidity in August is 76%.

How much does it rain in Waikapu in August?

In Waikapu, Hawaii, during August, the rain falls for 8.7 days and regularly aggregates up to 0.43" (11mm) of precipitation.

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

In August, the average length of the day is 12.8h.

How long on average sun shines in August in Waikapu?

In August, the average sunshine is 9.2h.

What are the months with the highest UV index in Waikapu?

Months with the highest UV index are July through October, with an average maximum UV index of 7.

How high is the UV index in August in Waikapu?

The average daily maximum UV index in August in Waikapu is 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in August
Waikapu, HI

Average temperature in August - Waikapu, HI
  • Average high temperature in August: 79.5°F

The warmest month (with the highest average high temperature) is September (79.9°F).
The month with the lowest average high temperature is February (73.9°F).

  • Average low temperature in August: 76.3°F

The month with the highest average low temperature is October (76.5°F).
The coldest months (with the lowest average low temperature) are February and March (70.7°F).

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Average pressure in August
Waikapu, HI

Average pressure in August - Waikapu, HI
  • Average pressure in August: 29.98"

The month with the highest atmospheric pressure is April (30.05").
Months with the lowest atmospheric pressure are September and October (29.97").

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Average wind speed in August
Waikapu, HI

Average wind speed in August - Waikapu, HI
  • Average wind speed in August: 13.4mph

The windiest month (with the highest average wind speed) is June (13.6mph).
The calmest month (with the lowest average wind speed) is January (10.4mph).

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Average humidity in August
Waikapu, HI

Average humidity in August - Waikapu, HI
  • Average humidity in August: 76%

Months with the highest relative humidity are July and August (76%).
Months with the lowest relative humidity are January and February (74%).

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Average rainfall in August
Waikapu, HI

Average rainfall in August - Waikapu, HI
  • Average rainfall in August: 0.43"

The wettest months (with the highest rainfall) are March and December (0.87").
The driest month (with the least rainfall) is June (0.2").

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Average rainfall days in August
Waikapu, HI

Average rainfall days in August - Waikapu, HI
  • Average rainfall days in August: 8.7 days

The month with the highest number of rainy days is March (11.9 days).
The month with the least rainy days is June (6.6 days).

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

Average daylight in August / Average sunshine in August - Waikapu, HI
  • Average daylight in August: 12.8h

The month with the longest days is June (Average daylight: 13.4h).
The month with the shortest days is December (Average daylight: 10.9h).

  • Average sunshine in August: 9.2h

The month with the most sunshine is June (Average sunshine: 11.5h).
The month with the least sunshine is December (Average sunshine: 7h).

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Average sunshine days in August
Waikapu, HI

Average sunshine days in August - Waikapu, HI
  • Average sunshine days in August: 15.8 days

The month with the most sunshine days is June (19.9 days).
The month with the least sunshine days is March (15.2 days).

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Average UV index in August
Waikapu, HI

Average UV index in August - Waikapu, HI
  • Average UV index in August: 7

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

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Average cloud cover in August
Waikapu, HI

Average cloud cover in August - Waikapu, HI
  • Average cloud cover in August: 24

The month with the most cloud cover is March (Cloud cover 30).
Months with the least cloud cover are June and September (Cloud cover 21).

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Average visibility in August
Waikapu, HI

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

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

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