December weather forecast
Santorini, Greece

December, the first month of the winter in Santorini, is also an enjoyable month, with temperature in the range of an average high of 16°C (60.8°F) and an average low of 11°C (51.8°F).

Temperature

In December, the average high-temperature marginally drops from 19°C (66.2°F) in November to a still enjoyable 16°C (60.8°F). The average low-temperature, in Santorini, is 11°C (51.8°F).

Rainfall

In Santorini, it is raining for 12 days, with typically 102mm (4.02") of accumulated precipitation. Throughout the year, in Santorini, there are 65 rainfall days, and 554mm (21.81") of precipitation is accumulated.

Sea temperature

In December, the average sea temperature is 17.6°C (63.7°F).
Note: For most, swimming in 17.6°C (63.7°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

Daylight

With an average of 9h and 44min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 07:11 and sunset at 17:03. On the last day of the month, sunrise is at 07:29 and sunset at 17:12 EET.

Sunshine

The months with the least sunshine are January and December, with an average of 4h of sunshine.

UV index

January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the average person.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.