September weather forecastHumenzhen, China
September
Weather in September
The ideal sea water temperature of 28°C (82.4°F) makes September in Humenzhen, China, the best time for swimming and other water activities.Sea temperature
In Humenzhen, China, the average seawater temperature in September is 28°C (82.4°F).Note: Water temperatures from 25°C (77°F) to 29°C (84.2°F) make swimming, diving, and similar activities highly pleasurable and enjoyable for long periods without discomfort.
Daylight
The average length of the day in September is 12h and 17min.On the first day of the month, sunrise is at 06:07 and sunset at 18:42. On the last day of September, sunrise is at 06:16 and sunset at 18:13 CST.
Updated: Jul 28, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
In Humenzhen, the average seawater temperature in September is 28°C (82.4°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.
In September, the average day length is 12h and 17min.
On the first day of September, sunrise is at 06:07 and sunset at 18:42. On the last day of the month, sunrise is at 06:16 and sunset at 18:13 CST.
Average sea temperature in September
Humenzhen, China
- Average sea temperature in September: 28°C
The best month for swimming (with the highest average sea temperature) is July (28.8°C).
The coldest month (with the lowest average sea temperature) is February (18.6°C).
Average daylight in September
Humenzhen, China
- Average daylight in September: 12h and 18min
The month with the longest days is June (Average daylight: 13h and 30min).
The month with the shortest days is December (Average daylight: 10h and 48min).





