Alderney
Guernsey
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Alderney, Guernsey

Sea temperature

In Alderney, Guernsey, the average seawater temperature in Diciembre is 12°C (53.6°F).
Note: Swimming in 12°C (53.6°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

The month with the shortest days in Alderney is Diciembre, with an average of 8.2h of daylight.

What is the water temperature in Diciembre in Alderney?

In Alderney, Guernsey, in Diciembre, the average water temperature is 12°C (53.6°F). Swimming in 12°C (53.6°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.

What is the month with the shortest days in Alderney?

With an average of 8.2h of daylight, Diciembre has the shortest days of the year in Alderney, Guernsey.

What is the average length of the day in Diciembre in Alderney?

In Alderney, Guernsey, the average length of the day in Diciembre is 8.2h.
Average sea temperature in December - Alderney, Guernsey
  • Average sea temperature in December: 12°C

The best month for swimming (with the highest average sea temperature) is September (17.4°C).
The coldest month (with the lowest average sea temperature) is March (9.3°C).

Average daylight in December - Alderney, Guernsey
  • Average daylight in December: 8.2h

The month with the longest days is June (Average daylight: 16.2h).
The month with shortest days is December (Average daylight: 8.2h).