December
Weather in December
Sea temperature
In December, the average sea temperature in Dachangshan Island, China, is 7.8°C (46°F).Note: In 7.8°C (46°F), cold shock and rapid breathing can occur when swimming at temperatures below 10°C (50°F).
Daylight
December has the shortest days of the year, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 06:50 and sunset at 16:27. On the last day of December, sunrise is at 07:09 and sunset at 16:36 CST.
Updated: Aug 29, 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
What is the water temperature in December?
In December, the average sea temperature is 7.8°C (46°F). Swimming in 7.8°C (46°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 30min of daylight.
How many hours of daylight does Dachangshan Island have in December?
The average day length in December is 9h and 28min.
When are sunrise and sunset in December?
In December, on the first day of the month, sunrise is at 06:50 and sunset at 16:27. On the last day of the month, sunrise is at 07:09 and sunset at 16:36 CST.
Average sea temperature in December
Dachangshan Island, China
- Average sea temperature in December: 7.8°C
The best month for swimming (with the highest average sea temperature) is August (24.3°C).
The coldest month (with the lowest average sea temperature) is February (2.2°C).
Average daylight in December
Dachangshan Island, China
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
