Greater Napanee
Canada
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Greater Napanee, Canada

Sea temperature

In December, the average sea temperature in Greater Napanee, Canada, is 5.4°C (41.7°F).
Note: Swimming in 5.4°C (41.7°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.

Daylight

The month with the shortest days is December, with an average of 8.9h of daylight.

What is the sea water temperature in December in Greater Napanee?

In December, the average sea temperature is 5.4°C (41.7°F). At temperatures below 10°C (50°F), 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 13°C (55.4°F) is not comfortable.

What is the month with the shortest days in Greater Napanee?

December has the shortest days of the year in Greater Napanee, Canada, with an average of 8.9h of daylight.

How many hours of daylight does Greater Napanee have in December?

In Greater Napanee, Canada, the average length of the day in December is 8.9h.
Average sea temperature in December - Greater Napanee, Canada
  • Average sea temperature in December: 5.4°C

The best month for swimming (with the highest average sea temperature) is August (22.3°C).
The coldest month (with the lowest average sea temperature) is March (1.9°C).

Average daylight in December - Greater Napanee, Canada
  • Average daylight in December: 8.9h

The month with the longest days is June (Average daylight: 15.5h).
The month with shortest days is December (Average daylight: 8.9h).