Hong Kong has a humid subtropical climate so the temperature ranges from mild to hot throughout the year. Autumn and early winter tend to be the sunniest, otherwise the city is often cloudy with thick fog relatively common.
Two main seasons
The weather in Hong Kong, like much of Southeast Asia, can be differentiated between two clear seasons: dry and wet. The drier, usually sunny season lasts from November to March, with an average rainfall of around 35mm. The rest of the year, rainfall is about ten times higher! During the hot and humid wet season, there's also a threat of typhoons, sometimes resulting in floods and landslides.
Best time to visit Hong Kong
To avoid the chance of your planned activities being affected by heavy rains, the best time to visit Hong Kong is during the dry season. You'll also find the temperature much more bearable during these months, as high levels of humidity and 30ºC (86ºF) plus temperatures can make the wet season overwhelming even if it's not raining.