July weather forecast
Wailuku, HI

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Weather in July

July brings about the year's warmest temperatures and a slight increase in rainfall compared to the previous month. Although rainfall increases marginally to 0.39" (10mm) across roughly 8.5 days, it hardly has an impact on the overall weather. Sunny and warm days, along with slightly increased cloud cover, provide respite from the glaring sun. July is all about embracing Wailuku’s tropical climate.

Temperature

The transition from June to July brings an average high-temperature of a still warm 78.8°F (26°C), barely different from June's 77.9°F (25.5°C). During July, the nighttime temperatures align closely with the daytime averages, measuring a still warm 75.6°F (24.2°C).

Humidity

The months with the highest humidity are July and August, with an average relative humidity of 76%.

Rainfall

In Wailuku, in July, during 8.5 rainfall days, 0.39" (10mm) of precipitation is typically accumulated. Throughout the year, there are 103.4 rainfall days, and 6.57" (167mm) of precipitation is accumulated.

Daylight

In Wailuku, the average length of the day in July is 13h and 16min.
On the first day of July, sunrise is at 5:48 am and sunset at 7:11 pm. On the last day of the month, sunrise is at 6:00 am and sunset at 7:04 pm HST.

Sunshine

In July, the average sunshine is 11.2h.

UV index

July through October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the average person.
Note: A daily high UV index of 7 in July leads to these guidelines:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Updated: Jul 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average July temperature?

Wailuku in July has an average high-temperature of 78.8°F (26°C) and an average low-temperature of 75.6°F (24.2°C).

What are the most humid months?

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

What is the average humidity in July?

In July, the average relative humidity is 76%.

How much does it rain in July?

In July, the rain falls for 8.5 days. Throughout July, 0.39" (10mm) of precipitation is accumulated.

How many hours of daylight does Wailuku have in July?

In July, the average day length is 13h and 16min.

What time are sunrise and sunset in July?

In July, on the first day of the month, sunrise is at 5:48 am and sunset at 7:11 pm. On the last day of the month, sunrise is at 6:00 am and sunset at 7:04 pm HST.

How many hours of sunshine does Wailuku have in July?

In July, the average sunshine duration is 11.2h.

What is the month with the highest UV index?

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

What is the UV index intensity in July?

In July, the average daily maximum UV index is 7. A UV Index reading of 6 to 7 represents a high hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in July
Wailuku, HI

Average temperature in July - Wailuku, HI
  • Average high temperature in July: 78.8°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 July: 75.6°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).

Average pressure in July
Wailuku, HI

Average pressure in July - Wailuku, HI
  • Average pressure in July: 30"Hg

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

Average wind speed in July
Wailuku, HI

Average wind speed in July - Wailuku, HI
  • Average wind speed in July: 13.5mph

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).

Average humidity in July
Wailuku, HI

Average humidity in July - Wailuku, HI
  • Average humidity in July: 76%

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

Average rainfall in July
Wailuku, HI

Average rainfall in July - Wailuku, HI
  • Average rainfall in July: 0.39"

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

Average rainfall days in July
Wailuku, HI

Average rainfall days in July - Wailuku, HI
  • Average rainfall days in July: 8.5 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).

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

Average daylight in July / Average sunshine in July - Wailuku, HI
  • Average daylight in July: 13h and 2min

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 July: 11h and 1min

The month with the most sunshine is June (Average sunshine: 11h and 30min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).

Average sunshine days in July
Wailuku, HI

Average sunshine days in July - Wailuku, HI
  • Average sunshine days in July: 16 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).

Average UV index in July
Wailuku, HI

Average UV index in July - Wailuku, HI
  • Average UV index in July: 7

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

Average cloud cover in July
Wailuku, HI

Average cloud cover in July - Wailuku, HI
  • Average cloud cover in July: 24

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

Average visibility in July
Wailuku, HI

Average visibility in July - Wailuku, HI
  • Average visibility in July: 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).

Wailuku, Hawaii, USA

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