December weather forecastOcean Bluff-Brant Rock, MA
December
Weather in December
Ocean temperature
In December, the average ocean temperature in Ocean Bluff-Brant Rock, Massachusetts, is 46.2°F (7.9°C).Note: Swimming in 46.2°F (7.9°C) is deemed hazardous. Exposure to temperatures below 50°F (10°C) leads to immediate severe cold shock and hyperventilation.
Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:52 am and sunset at 4:11 pm. On the last day of December, in Ocean Bluff-Brant Rock, sunrise is at 7:10 am and sunset at 4:21 pm EST.
Updated: Aug 2, 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
In Ocean Bluff-Brant Rock, in December, the average water temperature is 46.2°F (7.9°C). Swimming in 46.2°F (7.9°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.
December has the shortest days of the year, with an average of 9h and 12min of daylight.
In December, the average day length is 9h and 10min.
On the first day of December, sunrise is at 6:52 am and sunset at 4:11 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 4:21 pm EST.
Average sea temperature in December
Ocean Bluff-Brant Rock, MA
- Average sea temperature in December: 46.3°F
The best month for swimming (with the highest average sea temperature) is August (67.6°F).
The coldest month (with the lowest average sea temperature) is March (38.8°F).
Average daylight in December
Ocean Bluff-Brant Rock, MA
- Average daylight in December: 9h and 12min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
