The climate in Hong Kong during September can be summarized as hot, humid and very wet.
September is in the fall / autumn in Hong Kong and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a steamy 30°C (86°F), whilst at night 25°C (77°F) is normal.
|Daytime temperature||30.1°C 86.2°F|
|Nightly temperature||25.1°C 77.2°F|
|Average temperature||27.6°C 81.7°F|
|Daily sunshine||6.7 hrs|
|Avg rainfall||245 mm 9.6 ins|
|Rainy days||15 days|
|Sea temperature||28.4°C 83°F|
|Windspeed||9.4kph 6 mph|
On average September is the 5th wettest month of the year in Hong Kong with around 245mm 9.6 inches of rain making it a very wet time to visit. This rainfall is typically spread over 15 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.7 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Hong Kong in September 2023.
|Hottest month:||July||31.3°C 88.3°F|
|Driest month:||January||25mm 1ins|
|Coldest month:||January||18.4°C 65.1°F|
|Wettest month:||August||368mm 14.5ins|