Hong Kong's climate is subtropical and prone to monsoons. It is cooler and dry in the wintertime which lasts from around December to early March, and is hot, humid and rainy from spring through summer. It is warm, sunny, and dry in autumn. Hong Kong occasionally has tropical cyclones in the summer and early autumn. The ecology of Hong Kong is mostly affected by the results of climatic changes. Hong Kong's climate is seasonal due to the alternating wind directions between winter and summer. Hong Kong has been geologically stable for millions of years, though landslides are common especially after heavy rainstorms. Flora and fauna in Hong Kong are altered by climatic change, sea level alternation and human impact.
The highest recorded temperature in Hong Kong is 38°C (100.0°F) while the lowest recorded temperature is -4°C (25.0°F). Meanwhile, the highest and lowest temperatures ever recorded by the Observatory are respectively 36.1°C (97.0°F) on 19 August 1900 and 18 August 1990, and 0.0°C (32.0°F) on 18 January 1893. The average temperature in the coldest month, January, is 16.1°C (61.0°F) while the average temperature in the hottest month, July, is 28.7°C (83.7°F). The territory is situated south of the Tropic of Cancer which is approximate to Hawaii in latitude. In winter, strong and cold winds generate from the north cool the city; in the summer, the wind's prevailing direction changes and brings the warm and humid air in from the southwest. This climate can support a tropical rainforest. (wikipedia.org)
Three day forecast of Hong Kong: Click Here
Seasonal Changes of China Cities: Click Here
(China.org.cn)