Weather in December
Ocean temperature
In Cobb Island, Maryland, the average seawater temperature in December is 53.4°F (11.9°C).Note: Dipping in 53.4°F (11.9°C) at temperatures less than 50°F (10°C) without proper gear can lead to pronounced cold shock and breathing difficulties.
Daylight
The month with the shortest days is December, with an average of 9h and 36min of daylight.On the first day of December, sunrise is at 7:05 am and sunset at 4:47 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:57 pm EST.
Updated: Jul 24, 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
What is the water temperature in December?
In December, the average ocean temperature is 53.4°F (11.9°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.
What is the month with the shortest days?
With an average of 9h and 36min of daylight, December has the shortest days of the year.
How many hours of daylight does Cobb Island have in December?
The average day length in December is 9h and 34min.
When are sunrise and sunset in December?
On the first day of December, sunrise is at 7:05 am and sunset at 4:47 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:57 pm EST.
Average sea temperature in December
Cobb Island, MD
- Average sea temperature in December: 53.3°F
The best month for swimming (with the highest average sea temperature) is August (78.4°F).
The coldest month (with the lowest average sea temperature) is February (47.1°F).
Average daylight in December
Cobb Island, MD
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
Cobb Island, Maryland, USA
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