Weather in December
Sea temperature
In Shinagawa, Japan, the average seawater temperature in December is 17.3°C (63.1°F).Note: In water with a temperature of 17.3°C (63.1°F), most people do not enjoy swimming. As the temperature descends from 21°C (69.8°F) to 15°C (59°F), breathing becomes increasingly difficult to control.
Daylight
December has the shortest days of the year, with an average of 9h and 48min of daylight.On the first day of the month, sunrise is at 06:32 and sunset at 16:28. On the last day of December, in Shinagawa, sunrise is at 06:50 and sunset at 16:37 JST.
Frequently asked questions
How cold is the water in December in Shinagawa?
In December, the average sea temperature is 17.3°C (63.1°F). For most, swimming in 17.3°C (63.1°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).
What is the month with the shortest days in Shinagawa?
December has the shortest days of the year in Shinagawa, with an average of 9h and 48min of daylight.
How many hours of daylight does Shinagawa have in December?
In December, the average day length in Shinagawa is 9h and 48min.
What time are sunrise and sunset in December in Shinagawa?
On the first day of December in Shinagawa, sunrise is at 06:32 and sunset at 16:28. On the last day of the month, sunrise is at 06:50 and sunset at 16:37 JST.
Average sea temperature in December
Shinagawa, Japan
- Average sea temperature in December: 17.3°C
The best month for swimming (with the highest average sea temperature) is August (25.7°C).
The coldest month (with the lowest average sea temperature) is February (14°C).
Average daylight in December
Shinagawa, Japan
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
Shinagawa, Japan
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