December weather forecast
Vilamoura, Portugal

Vilamoura, Portugal witnesses the onset of winter in December, with temperatures decreasing even further and rainfall increasing from November. With daylight dwindling to 9.7 hours from 10.2 hours in November, winter activities take a step backward. The weather marks a return to the year's outset, with December experiencing the highest rainfall level at 100mm (3.94"). The fluctuating temperatures depict a variation from 16°C (60.8°F) during the day to cooler 9°C (48.2°F) in the night. The UV Index drops to its lowest at 2, signalling weaker sunlight and the arrival of the full winter season.

Temperature

In Vilamoura, the months of January, February and December are known for the lowest temperatures, reaching an average high of 16°C (60.8°F).

Rainfall

December is the month with the most rainfall in Vilamoura. Rain falls for 12 days and accumulates 100mm (3.94") of precipitation.

Sea temperature

In Vilamoura, in December, the average water temperature is 17°C (62.6°F).
Note: Most people do not take pleasure in swimming in water at 17°C (62.6°F). The difficulty of managing breathing increases as the water temperature dips from 21°C (69.8°F) to 15°C (59°F).

Daylight

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

Sunshine

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

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: During December, 2 as the daily maximum UV index converts into the following advice:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.