July weather forecast and climate
Wailua, HI

Weather in July

July, the same as June, is a moderately hot summer month in Wailua, Hawaii, with average temperature varying between 79°F (26.1°C) and 75°F (23.9°C).

Temperature

In July, the average high-temperature is practically the same as in June - a still moderately hot 79°F (26.1°C). The average low-temperature, in July, is 75°F (23.9°C).

Humidity

June through August, October and December, with an average relative humidity of 77%, are most humid months.

Rainfall

In Wailua, during 20.9 rainfall days, 1.77" (45mm) of precipitation is typically accumulated. Throughout the year, there are 218.4 rainfall days, and 22.13" (562mm) of precipitation is accumulated.

Ocean temperature

In Wailua, Hawaii, the average seawater temperature is 78.8°F (26°C).
Note: 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.

Daylight

The average length of the day in Wailua is 13.3h.

Sunshine

In July, the average sunshine in Wailua is 8.6h.

UV index

Months with the lowest UV index in Wailua are January through August, October through December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: In July, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

What are the most humid months in Wailua?

Months with the highest humidity in Wailua are June through August, October and December, with an average relative humidity of 77%.

What is the average humidity in July in Wailua?

In July, the average relative humidity in Wailua is 77%.

How many days does it rain in July in Wailua?

In Wailua, Hawaii, in July, during 20.9 rainfall days, 1.77" (45mm) of precipitation is typically accumulated.

What is the water temperature in July in Wailua?

In July, the average ocean temperature in Wailua is 78.8°F (26°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 July in Wailua?

The average length of the day in July in Wailua is 13.3h.

How many hours of sunshine does Wailua have in July?

In July, the average sunshine in Wailua, Hawaii, is 8.6h.

When is the lowest UV index in Wailua?

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

What is the UV index reading in July in Wailua?

In Wailua, Hawaii, the average daily maximum UV index in July is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from unprotected exposure to the UV radiation.

Average temperature in July
Wailua, HI

Average temperature in July - Wailua, HI
  • Average high temperature in July: 79°F

The warmest month (with the highest average high temperature) is September (79.7°F).
Months with the lowest average high temperature are February and March (73.2°F).

  • Average low temperature in July: 75°F

The month with the highest average low temperature is September (75.9°F).
The coldest month (with the lowest average low temperature) is February (68.5°F).

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Average pressure in July
Wailua, HI

Average pressure in July - Wailua, HI
  • Average pressure in July: 30.02"

The month with the highest atmospheric pressure is April (30.07").
Months with the lowest atmospheric pressure are September and October (29.98").

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Average wind speed in July
Wailua, HI

Average wind speed in July - Wailua, HI
  • Average wind speed in July: 12.3mph

The windiest month (with the highest average wind speed) is July (12.3mph).
The calmest month (with the lowest average wind speed) is January (10mph).

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Average humidity in July
Wailua, HI

Average humidity in July - Wailua, HI
  • Average humidity in July: 77%

Months with the highest relative humidity are June, July, August, October and December (77%).
The month with the lowest relative humidity is January (75%).

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Average rainfall in July
Wailua, HI

Average rainfall in July - Wailua, HI
  • Average rainfall in July: 1.77"

The wettest month (with the highest rainfall) is March (2.52").
The driest month (with the least rainfall) is April (1.3").

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Average rainfall days in July
Wailua, HI

Average rainfall days in July - Wailua, HI
  • Average rainfall days in July: 20.9 days

The month with the highest number of rainy days is August (21.1 days).
The month with the least rainy days is January (12.5 days).

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Average sea temperature in July
Wailua, HI

Average sea temperature in July - Wailua, HI
  • Average sea temperature in July: 78.7°F

The best month for swimming (with the highest average sea temperature) is September (80.2°F).
The coldest month (with the lowest average sea temperature) is March (74.8°F).

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Average daylight in July /
Average sunshine in July
Wailua, HI

Average daylight in July / Average sunshine in July - Wailua, HI
  • Average daylight in July: 13.3h

The month with the longest days is June (Average daylight: 13.5h).
The month with the shortest days is December (Average daylight: 10.8h).

  • Average sunshine in July: 8.6h

The month with the most sunshine is June (Average sunshine: 9.7h).
The month with the least sunshine is November (Average sunshine: 6.2h).

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Average sunshine days in July
Wailua, HI

Average sunshine days in July - Wailua, HI
  • Average sunshine days in July: 3.9 days

The month with the most sunshine days is January (12.8 days).
The month with the least sunshine days is August (2.9 days).

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Average UV index in July
Wailua, HI

Average UV index in July - Wailua, HI
  • Average UV index in July: 6

The month with the highest UV index is September (UV index 7).
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 July
Wailua, HI

Average cloud cover in July - Wailua, HI
  • Average cloud cover in July: 44

The month with the most cloud cover is March (Cloud cover 47).
Months with the least cloud cover are January and September (Cloud cover 38).

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Average visibility in July
Wailua, HI

Average visibility in July - Wailua, HI
  • Average visibility in July: 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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