August weather forecast
Hong Kong, Hong Kong

The lit city of Hong Kong, on the Hong Kong Island
The lit city of Hong Kong, on the Hong Kong Island

Weather in August

August, the last month of the summer in Hong Kong, is another hot month, with an average temperature fluctuating between 26.6°C (79.9°F) and 31.1°C (88°F).

Temperature

In Hong Kong, the average high-temperature in August is relatively the same as in July - a still tropical 31.1°C (88°F). The average low-temperature, in August, is 26.6°C (79.9°F).

Heat index

In August, the average heat index is appraised at a scorching 41.6°C (106.9°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'apparent temperature', 'felt air temperature', or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Additional factors like pregnancy, wind, metabolic differences, and activity influence one's weather impression. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In Hong Kong, the average relative humidity in August is 81%.

Rainfall

In Hong Kong, during August, the rain falls for 16.9 days and regularly aggregates up to 432.2mm (17.02") of precipitation. Throughout the year, there are 137.8 rainfall days, and 2398.4mm (94.43") of precipitation is accumulated.

Sea temperature

In Hong Kong, Hong Kong, the average seawater temperature in August is 28.7°C (83.7°F).
Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

The average length of the day in August in Hong Kong is 12h and 53min.
On the first day of August in Hong Kong, sunrise is at 05:55 and sunset at 19:04. On the last day of the month, sunrise is at 06:05 and sunset at 18:41 HKT.

Sunshine

In Hong Kong, the average sunshine in August is 6.1h.

UV index

The months with the highest UV index are April through August, with an average maximum UV index of 12. A UV Index of 11, and more, symbolizes an excessive health risk from exposure to the Sun's UV radiation for average individuals.
Note: In August, the average maximum UV index of 12 translate into the following recommendations:
Take all necessary precautions, as unprotected skin can burn in 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the temperature in August in Hong Kong?

In Hong Kong, in August, the average high-temperature is 31.1°C (88°F), and the average low-temperature is 26.6°C (79.9°F). In August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines air temperature and relative humidity, is appraised at 41.6°C (106.9°F).

What is the average humidity in August in Hong Kong?

In August, the average relative humidity is 81%.

How many days does it rain in August in Hong Kong?

In August, in Hong Kong, Hong Kong, the rain falls for 16.9 days. Throughout August, 432.2mm (17.02") of precipitation is accumulated.

How warm is the water in August in Hong Kong?

In Hong Kong, in August, the average water temperature is 28.7°C (83.7°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

What is the average length of the day in August in Hong Kong?

The average day length in August is 12h and 53min.

When is the sunrise / sunset in August in Hong Kong?

In August, on the first day of the month, sunrise is at 05:55 and sunset at 19:04. On the last day of the month, in Hong Kong, Hong Kong, sunrise is at 06:05 and sunset at 18:41 HKT.

How many hours of sunshine does Hong Kong have in August?

The average sunshine duration in August is 6.1h.

What are the months with the highest UV index in Hong Kong?

The months with the highest UV index in Hong Kong, Hong Kong, are April through August, with an average maximum UV index of 12.

What is the UV index reading in August in Hong Kong?

In Hong Kong, Hong Kong, the average daily maximum UV index in August is 12. A UV Index reading of 11, and higher, represents an excessive health risk from unsafe exposure to Sun's UV rays.

Average temperature in August
Hong Kong, Hong Kong

Average temperature in August - Hong Kong, Hong Kong
  • Average high temperature in August: 31.1°C

The warmest month (with the highest average high temperature) is July (31.4°C).
The month with the lowest average high temperature is January (18.6°C).

  • Average low temperature in August: 26.6°C

The month with the highest average low temperature is July (26.8°C).
The coldest month (with the lowest average low temperature) is January (14.5°C).

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Average humidity in August
Hong Kong, Hong Kong

Average humidity in August - Hong Kong, Hong Kong
  • Average humidity in August: 81%

The months with the highest relative humidity are April and May (83%).
The month with the lowest relative humidity is December (69%).

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Average rainfall in August
Hong Kong, Hong Kong

Average rainfall in August - Hong Kong, Hong Kong
  • Average rainfall in August: 432.2mm

The wettest month (with the highest rainfall) is June (456.1mm).
The driest month (with the least rainfall) is January (24.7mm).

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Average rainfall days in August
Hong Kong, Hong Kong

Average rainfall days in August - Hong Kong, Hong Kong
  • Average rainfall days in August: 16.9 days

The month with the highest number of rainy days is June (19.1 days).
The month with the least rainy days is December (4.5 days).

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Average sea temperature in August
Hong Kong, Hong Kong

Average sea temperature in August - Hong Kong, Hong Kong
  • Average sea temperature in August: 28.7°C

The best month for swimming (with the highest average sea temperature) is July (29.1°C).
The coldest month (with the lowest average sea temperature) is February (18.9°C).

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Average daylight in August /
Average sunshine in August
Hong Kong, Hong Kong

Average daylight in August / Average sunshine in August - Hong Kong, Hong Kong
  • Average daylight in August: 12h and 53min

The month with the longest days is June (Average daylight: 13h and 29min).
The month with the shortest days is December (Average daylight: 10h and 48min).

  • Average sunshine in August: 6.1h

The month with the most sunshine is July (Average sunshine: 6.8h).
The month with the least sunshine is March (Average sunshine: 2.9h).

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Average UV index in August
Hong Kong, Hong Kong

Average UV index in August - Hong Kong, Hong Kong
  • Average UV index in August: 12

The months with the highest UV index are April, May, June, July and August (UV index 12).
The months with the lowest UV index are January, November and December (UV index 7).

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