Weather in January
Winter's grip descends steadily on Cape Cod National Seashore in January. Sea temperatures plummet to the low 41.5°F (5.3°C), their lowest of the year, making maritime activities less attractive. This month experiences a relatively robust transition into the New Year's winter, and one could expect less daylight—with just under 10 hours per day on average. Compared to December, January has lower sea temperatures and marginally increased daylight.
Note: Swimming in 41.5°F (5.3°C) poses a severe threat. Even short exposure to 55.4°F (13°C) is chilling, and going below 50°F (10°C) can cause breathing irregularities and intense cold shock, based on one's stamina.
On the first day of January, sunrise is at 7:07 am and sunset at 4:19 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 4:53 pm EST.
Ocean temperature
In January, the average ocean temperature is 41.5°F (5.3°C).Note: Swimming in 41.5°F (5.3°C) poses a severe threat. Even short exposure to 55.4°F (13°C) is chilling, and going below 50°F (10°C) can cause breathing irregularities and intense cold shock, based on one's stamina.
Daylight
The average length of the day in January is 9h and 32min.On the first day of January, sunrise is at 7:07 am and sunset at 4:19 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 4:53 pm EST.
Updated: Jun 4, 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 ocean temperature in January in Cape Cod National Seashore?
In Cape Cod National Seashore, the average seawater temperature in January is 41.5°F (5.3°C). Swimming in 41.5°F (5.3°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.
What is the average length of the day in January?
In January, the average day length is 9h and 32min.
When is the sunrise / sunset in January?
In January, on the first day of the month, sunrise is at 7:07 am and sunset at 4:19 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 4:53 pm EST.
Average sea temperature in January
Cape Cod National Seashore, MA
- Average sea temperature in January: 41.5°F
The best month for swimming (with the highest average sea temperature) is August (67.5°F).
The coldest month (with the lowest average sea temperature) is March (39°F).
Average daylight in January
Cape Cod National Seashore, MA
- Average daylight in January: 9h and 3min
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).
Cape Cod National Seashore, Massachusetts, USA
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