North Plymouth
Massachusetts, USA
Long-term weather forecast
Long-term weather forecast

January weather forecast and climate
North Plymouth, MA

Ocean temperature

In January, the average ocean temperature in North Plymouth, Massachusetts, is 41.4°F (5.2°C).
Note: Swimming in 41.4°F (5.2°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.

Daylight

In North Plymouth, Massachusetts, the average length of the day in January is 9.5h.

What is the water temperature in January in North Plymouth?

In January, the average ocean temperature in North Plymouth is 41.4°F (5.2°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 average length of the day in January in North Plymouth?

In January, the average length of the day in North Plymouth, Massachusetts, is 9.5h.
Average sea temperature in January - North Plymouth, MA
  • Average sea temperature in January: 41.3°F

The best month for swimming (with the highest average sea temperature) is August (68.4°F).
The coldest month (with the lowest average sea temperature) is February (38.2°F).

Average daylight in January - North Plymouth, MA
  • Average daylight in January: 9.5h

The month with the longest days is June (Average daylight: 15.2h).
The month with shortest days is December (Average daylight: 9.2h).