Weather in December
Ocean temperature
In Seacliff State Beach, California, in December, the average water temperature is 55.6°F (13.1°C).Note: It is risky to swim in 55.6°F (13.1°C). Temperatures beneath 50°F (10°C) induce rapid cold shock and hyperventilation.
Daylight
With an average of 9h and 42min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:02 am and sunset at 4:51 pm. On the last day of December, sunrise is at 7:20 am and sunset at 5:01 pm PST.
Updated: Jul 7, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is the water in December?
In Seacliff State Beach, the average seawater temperature in December is 55.6°F (13.1°C). Swimming in 55.6°F (13.1°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.
What is the month with the shortest days?
With an average of 9h and 42min of daylight, December has the shortest days of the year.
How many hours of daylight does Seacliff State Beach have in December?
In December, the average day length is 9h and 40min.
When are sunrise and sunset in December?
On the first day of December, sunrise is at 7:02 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 5:01 pm PST.
Average sea temperature in December
Seacliff State Beach, CA
- Average sea temperature in December: 55.6°F
The best months for swimming (with the highest average sea temperature) are August and September (58.1°F).
The coldest month (with the lowest average sea temperature) is April (53.8°F).
Average daylight in December
Seacliff State Beach, CA
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
Seacliff State Beach, California, USA
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