Hong Kong
Hong Kong
Long-term weather forecast
Long-term weather forecast
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May weather forecast and Climate
Hong Kong, Hong Kong

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A bird
A bird's eye view of the lit city of Hong Kong, in the Hong Kong Island
May is a transitional month in spring as the temperatures rise along with an increase in wet conditions and the highest humidity of the year at 83%. It is pleasantly warm with the average temperatures in the range of 23.9°C (75°F) to 28.3°C (82.9°F) with an odd day or two touching a hot 31.7°C (89.1°F).
The skies are mostly cloudy as the daily sunshine lasts for 5 hours. It is a precursor of the frequent heavy rains of the summer as the rain gauge accumulates 302.3mm (11.9").
May is an ideal time to tour the beautiful Outlying Islands with many ferry rides ready to explore the peaceful side of Hong Kong. Tourists find the spring a great holiday time due to the pleasant weather as sunny days alternate between cloudy ones, to undertake fantastic tours from deserted beaches to dolphin watching. Some of them prefer to be in light shirts with the rise in the heat and to experience the coolness of the raindrops!
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  • The 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).

  • The 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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  • The average humidity in May: 83%

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

  • The average rainfall in May: 304.7mm

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

  • The 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 lowest number of rainy days is December (4.5 days).

  • The 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).

  • The average daylight in May: 13h

Months with the longest days are April, May, June, July and August (Average daylight: 13h).
Months with shortest days are January, February, November and December (Average daylight: 11h).

  • The average sunshine in May: 4.5h

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

  • The average UV index in May: 12

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

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