Climate

The climate in Hong Kong is sub-tropical, but tends to be temperate for nearly half the year. The reason for this is because the huge land mass of Asia generates cold fronts that blow from the north during the winter months. It is not uncommon for temperatures to drop below 10°C in urban areas during this time. In the summer months (June, July and August) this is reversed and the seasonal winds blow from the south bringing hot humid tropical air.

The autumn months of October to December bring sunny dry weather with cool breezes and low humidity, and by many people these are considered the best months of the year. The winter months of January and February are often cloudy with occasional cold fronts. March until May is usually very pleasant, but there is the possibility of rain and humidity in these months. June tends to be the wettest of the summer months, and from July to September you can expect high humidity with temperatures between 26°C to 31°C. September is the month during which Hong Kong is most likely to be affected by tropical cyclones. Hong Kong is not in an earthquake zone.

As Hong Kong is notorious for its high humidity during the summer months, careful consideration should be given when deciding whether to bring any precious pieces of wooden furniture or oil paintings.


Month

Mean
Pressure
(hPa)
Air     Temperature
Mean
Dew Point
(deg. C)

Mean
Relative
Humidity
(%)

Mean
Amount
of Cloud
(%)

Total
Rainfall
(mm)

Mean Daily
Maximum
(deg. C)

Mean
(deg. C)

Mean Daily
Minimum
(deg. C)
January 1019.3 17.0 15.1 13.5 11.9 82 79 42.1
February 1016.8 17.8 15.8 14.0 13.1 85 84 29.5
March 1015.6 21.8 19.0 16.9 15.8 83 75 22.1
April 1011.3 26.2 23.9 22.0 21.2 85 80 294.9
May 1007.5 29.4 27.0 25.5 24.4 86 78 277.7
June 1002.6 30.5 28.1 26.4 25.0 83 78 261.5
July 1004.6 31.6 28.8 26.8 25.2 81 70 467.8
August 1003.3 32.3 29.5 27.4 24.9 77 71 149.8
September 1010.3 30.9 28.0 26.0 23.0 75 65 213.0
October 1014.3 28.3 25.6 23.7 20.4 74 59 46.4
November 1015.5 24.2 22.2 20.6 18.7 81 76 63.9
December 1018.3 19.7 17.8 15.9 13.8 78 74 56.0
Mean/Total 1011.6 25.8 23.4 21.6 19.8 81 74 1924.7
Normal* 1012.9 25.6 23.3 21.4 19.0 78 68 2398.5
Station Hong  Kong  Observatory