December weather forecastGibraltar, Gibraltar

Weather in December

December marks the onset of winter in Gibraltar, boating colder temperatures and higher occurrences of rainfall. Rainfall remains high, collecting 127mm (5") over 10 days, nearly matching the peak seen in January. Sea temperatures drop to a yearly low of 16.8°C (62.2°F) dissuading most water sport activities. The daylight hours are at their shortest, and the sunshine duration reduces to six hours a day. A low UV index of two accompanies the cooler climate, providing a respite from the heat of preceding months.

Temperature

Gibraltar records an average high-temperature of a still refreshing 17°C (62.6°F) in December, maintaining a close correlation with November's 19°C (66.2°F). An average nighttime temperature of 11°C (51.8°F) is noted during the month of December.

Rainfall

In December, the rain falls for 10 days. Throughout December, 127mm (5") of precipitation is accumulated. Throughout the year, in Gibraltar, there are 63.5 rainfall days, and 767mm (30.2") of precipitation is accumulated.

Sea temperature

In Gibraltar, in December, the average water temperature is 16.8°C (62.2°F).
Note: Swimming in water of 16.8°C (62.2°F) is not enjoyable for the majority of individuals. Breathing control becomes increasingly challenging as the temperature dips from 21°C (69.8°F) to 15°C (59°F).

Daylight

December has the shortest days of the year, with an average of 9h and 48min of daylight.
On the first day of the month, sunrise is at 08:14 and sunset at 18:07. On the last day of December, sunrise is at 08:32 and sunset at 18:17 CET.

Sunshine

January, November and December, with an average of 6h 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 of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the average person.
Note: In December, the maximum UV index of 2 suggests these recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation around mid-day is intense; avoid the Sun and stay safe. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.