September weather forecastInno-shima, Japan
September
Weather in September
The ideal sea water temperature of 26°C (78.8°F) makes September in Inno-shima, Japan, the best time for swimming and other water activities.Sea temperature
In September, the average sea temperature is 26°C (78.8°F).Note: In water temperatures ranging between 25°C (77°F) and 29°C (84.2°F), activities such as swimming and diving become highly pleasurable for long durations.
Daylight
In September, the average length of the day is 12h and 24min.On the first day of September, sunrise is at 05:40 and sunset at 18:33. On the last day of the month, sunrise is at 06:01 and sunset at 17:53 JST.
Updated: Jan 31, 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 Inno-shima, Japan, the average seawater temperature in September is 26°C (78.8°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.
The average day length in September is 12h and 24min.
In September, on the first day of the month, sunrise is at 05:40 and sunset at 18:33. On the last day of the month, in Inno-shima, sunrise is at 06:01 and sunset at 17:53 JST.
Average sea temperature in September
Inno-shima, Japan
- Average sea temperature in September: 26°C
The best month for swimming (with the highest average sea temperature) is August (27.2°C).
The coldest month (with the lowest average sea temperature) is February (13.7°C).
Average daylight in September
Inno-shima, Japan
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
