December weather forecast
Castellón de la Plana, Spain

December in Castellón de la Plana is characterized by wintry weather. Sea temperature averages at 15.9°C (60.6°F) evidently showing the chilly wave of winter. Relative humidity levels and daylight hours scale down, adding to the crispness of the winter months. Despite the winter chill, the climatic conditions continue to be favourable for outdoor activities. As the year draws to an end, relatively high rainfall and low sunshine hours mark the month of December.

Temperature

In December, the meteorological conditions in Castellón de la Plana change slightly, with the average high-temperature moving from an enjoyable 18.8°C (65.8°F) in November to a still refreshing 15.8°C (60.4°F). An average temperature of 7°C (44.6°F) is recorded during the nights in December.

Humidity

In Castellón de la Plana, the average relative humidity in December is 68%.

Rainfall

In Castellón de la Plana, in December, it is raining for 4 days, with typically 42mm (1.65") of accumulated precipitation. In Castellón de la Plana, Spain, during the entire year, the rain falls for 45 days and collects up to 468mm (18.43") of precipitation.

Sea temperature

In December, the average sea temperature in Castellón de la Plana, Spain, is 15.9°C (60.6°F).
Note: Swimming in 15.9°C (60.6°F) does not offer a pleasant experience for most individuals. The act of controlling one's breathing becomes progressively difficult as the water temperature goes under 21°C (69.8°F).

Daylight

The month with the shortest days is December, with an average of 9h and 24min of daylight.
On the first day of the month, sunrise is at 08:03 and sunset at 17:35. On the last day of December, in Castellón de la Plana, sunrise is at 08:21 and sunset at 17:45 CET.

Sunshine

December has the least sunshine of the year, with an average of 5.3h of sunshine.

UV index

January, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Castellón de la Plana. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: In December, the UV index of 2 transforms into the following advice:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.