Kowloon Weather in September
What's the weather like in Kowloon (Hong Kong) in September 2025?
The climate in Kowloon during September can be summarized as hot, humid and very wet.
September is in the fall / autumn in Kowloon 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°C 86°F |
|---|---|
| Nightly temperature | 25.2°C 77.4°F |
| Average temperature | 27.6°C 81.7°F |
| Daily sunshine | 6.7 hrs |
| Avg rainfall | 253 mm 10 ins |
| Rainy days | 14 days |
| Sea temperature | 28.4°C 83°F |
| Humidity | 78% |
| Windspeed | 9.4kph 6 mph |
On average September is the 5th wettest month of the year in Kowloon with around 253mm 10 inches of rain making it a very wet time to visit. This rainfall is typically spread over 14 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.7 hours of sunshine per day.
September temperatures in Kowloon
September rainfall
September hourly sunshine
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 Kowloon in September 2025.
Other monthly averages
Best places to visit in September
Kowloon weather stats
| Hottest month: | July | 31.1°C 88°F |
|---|---|---|
| Driest month: | January | 26mm 1ins |
| Sunniest month: | November | 6.7hrs |
| Coldest month: | January | 18.4°C 65.1°F |
| Wettest month: | August | 377mm 14.8ins |
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