May 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 May

The last month of the spring, May, is also a moderately hot month in Hong Kong, Hong Kong, with an average temperature varying between 24.1°C (75.4°F) and 28.4°C (83.1°F).

Temperature

In May, the average high-temperature marginally rises from 25°C (77°F) in April to a still moderately hot 28.4°C (83.1°F). The average low-temperature, in May, is 24.1°C (75.4°F).

Heat index

The average heat index in May is appraised at a tropical 34°C (93.2°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'felt air temperature', 'real feel', or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Additional factors like activity, differences in body mass, height, and shape, wind, and clothing affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. 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.

Humidity

April and May, with an average relative humidity of 83%, are the most humid months.

Rainfall

In May, in Hong Kong, Hong Kong, the rain falls for 14.7 days. Throughout May, 305mm (12.01") of precipitation is accumulated. In Hong Kong, during the entire year, the rain falls for 137.8 days and collects up to 2398mm (94.41") of precipitation.

Sea temperature

In May, the average sea temperature in Hong Kong is 26.8°C (80.2°F).
Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

In Hong Kong, the average length of the day in May is 13h and 13min.
On the first day of May, sunrise is at 05:51 and sunset at 18:49. On the last day of the month, sunrise is at 05:39 and sunset at 19:02 HKT.

Sunshine

In May, the average sunshine is 4.5h.

UV index

The months with the highest UV index in Hong Kong are April through August, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an ultimate health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 12 in May interpret into the following advice:
Practice all-important precautions. Light skin people may get burned in less than 5 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

What is the temperature in May in Hong Kong?

In May, the average high-temperature is 28.4°C (83.1°F), and the average low-temperature is 24.1°C (75.4°F). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in May is appraised at 34°C (93.2°F).

What is the most humid month in Hong Kong?

The months with the highest humidity are April and May, with an average relative humidity of 83%.

What is the average humidity in May in Hong Kong?

In May, the average relative humidity is 83%.

How much does it rain in Hong Kong in May?

In Hong Kong, in May, during 14.7 rainfall days, 305mm (12.01") of precipitation is typically accumulated.

How warm is the water in May in Hong Kong?

In Hong Kong, Hong Kong, the average seawater temperature in May is 26.8°C (80.2°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

How many hours of daylight does Hong Kong have in May?

In May, the average day length in Hong Kong, Hong Kong, is 13h and 13min.

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

In May, on the first day of the month, sunrise is at 05:51 and sunset at 18:49. On the last day of the month, in Hong Kong, Hong Kong, sunrise is at 05:39 and sunset at 19:02 HKT.

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

The average sunshine duration in May in Hong Kong is 4.5h.

What is the month with the highest UV index in Hong Kong?

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

What is the UV index intensity in May in Hong Kong?

In May, the average daily maximum UV index is 12. A UV Index value of 11, and more, symbolizes an extreme health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average sunshine
Average UV index

Average temperature in May
Hong Kong, Hong Kong

Average temperature in May - Hong Kong, Hong Kong
  • Average high temperature in May: 28.4°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 May: 24.1°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 May
Hong Kong, Hong Kong

Average humidity in May - Hong Kong, Hong Kong
  • Average humidity in May: 83%

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 May
Hong Kong, Hong Kong

Average rainfall in May - Hong Kong, Hong Kong
  • Average rainfall in May: 304.7mm

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 May
Hong Kong, Hong Kong

Average rainfall days in May - Hong Kong, Hong Kong
  • Average rainfall days in May: 14.7 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 May
Hong Kong, Hong Kong

Average sea temperature in May - Hong Kong, Hong Kong
  • Average sea temperature in May: 26.8°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 May /
Average sunshine in May
Hong Kong, Hong Kong

Average daylight in May / Average sunshine in May - Hong Kong, Hong Kong
  • Average daylight in May: 13h and 13min

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 May: 4h and 30min

The month with the most sunshine is July (Average sunshine: 6h and 48min).
The month with the least sunshine is March (Average sunshine: 2h and 54min).

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Average UV index in May
Hong Kong, Hong Kong

Average UV index in May - Hong Kong, Hong Kong
  • Average UV index in May: 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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