December weather forecast
Quarteira, Portugal

December brings the chill of winter to Quarteira. Temperatures descend further from November, and the city encounters a considerable amount of rain, approximately 100mm (3.94") across 12 days. Daylight hours drop to an annual low of 9.7 hours coupled with a decline in sea temperature down to 17.6°C (63.7°F). With December, the year rounds off on a cooler note, offering a unique charm to those fond of winter journeys.

Temperature

January, February and December, with an average high-temperature of 16°C (60.8°F), are the coldest months.

Rainfall

The month with the most rainfall is December, when the rain falls for 12 days and typically aggregates up to 100mm (3.94") of precipitation.

Sea temperature

In Quarteira, the average seawater temperature in December is 17.6°C (63.7°F).
Note: For most individuals, swimming in 17.6°C (63.7°F) is not enjoyable. As the water temperature decreases from 21°C (69.8°F) to 15°C (59°F), breathing control becomes increasingly difficult.

Daylight

With an average of 9h and 42min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 07:27 and sunset at 17:15. On the last day of December, in Quarteira, sunrise is at 07:45 and sunset at 17:25 WET.

Sunshine

The months with the least sunshine in Quarteira, Portugal, are January and December, with an average of 5h of sunshine.

UV index

The months with the lowest UV index in Quarteira are January and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.