Santorini
Greece
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Santorini, Greece

The white houses on the Island of lovers overlooking clear blue waters with small boats sailing, in Santorini, Greece, a small mountain in the distance
The white houses on the Island of lovers overlooking clear blue waters with small boats sailing, in Santorini, Greece, a small mountain in the distance
The first month of the winter, December, is also an enjoyable month in Santorini, Greece, with average temperature fluctuating between 16°C (60.8°F) and 11°C (51.8°F).

Temperature

In Santorini, the average high-temperature in December slightly decreases, 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, in December, during 12 rainfall days, 102mm (4") of precipitation is typically accumulated. In Santorini, during the entire year, the rain falls for 65 days and collects up to 554mm (21.8") of precipitation.

Sea temperature

In Santorini, the average seawater temperature is 17.6°C (63.7°F). For swimming, a surface water temperature of 17.6°C (63.7°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

Daylight

December has the shortest days of the year, with an average of 9.7h of daylight.

Sunshine

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 low threat to health from the exposure to the Sun's UV rays for the average person.
The average daily UV index of 2 transform into the following instructions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.

What is the temperature in December in Santorini?

In Santorini, Greece, in December, the average high-temperature is 16°C (60.8°F), and the average low-temperature is 11°C (51.8°F).

How many days does it rain in December in Santorini?

In Santorini, Greece, during December, the rain falls for 12 days and regularly aggregates up to 102mm (4") of precipitation.

What is the sea temperature in December in Santorini?

In December, the average sea temperature in Santorini, Greece, is 17.6°C (63.7°F). For swimming, a surface water temperature of 17.6°C (63.7°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

What is the month with the shortest days in Santorini?

December has the shortest days of the year in Santorini, Greece, with an average of 9.7h of daylight.

How many hours of daylight does Santorini have in December?

In Santorini, the average length of the day in December is 9.7h.

What is the month with the least sunshine in Santorini?

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

How many hours of sunshine does Santorini have in December?

The average sunshine in December is 4h.

When is the lowest UV index in Santorini?

Months with the lowest UV index in Santorini are January and December, with an average maximum UV index of 2.

What is the UV index intensity in December in Santorini?

The average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health threat from the exposure to the Sun's UV rays.
Average temperature in December - Santorini, Greece
  • Average high temperature in December: 16°C

The warmest month (with the highest average high temperature) is July (28°C).
Months with the lowest average high temperature are January and February (14°C).

  • Average low temperature in December: 11°C

Months with the highest average low temperature are July and August (22°C).
Coldest months (with the lowest average low temperature) are January and February (9°C).

Average rainfall in December - Santorini, Greece
  • Average rainfall in December: 102mm

The wettest month (with the highest rainfall) is January (114mm).
Driest months (with the lowest rainfall) are July and August (1mm).

Average rainfall days in December - Santorini, Greece
  • Average rainfall days in December: 12 days

The month with the highest number of rainy days is December (12 days).
Months with the lowest number of rainy days are June, July, August and September (1 days).

Average sea temperature in December - Santorini, Greece
  • Average sea temperature in December: 17.6°C

The best month for swimming (with the highest average sea temperature) is August (25.7°C).
The coldest month (with the lowest average sea temperature) is February (16.5°C).

Average daylight in December / Average sunshine in December - Santorini, Greece
  • Average daylight in December: 9.7h

The month with the longest days is June (Average daylight: 14.6h).
The month with shortest days is December (Average daylight: 9.7h).

  • Average sunshine in December: 4h

Months with most sunshine are June and July (Average sunshine: 13h).
Months with least sunshine are January and December (Average sunshine: 4).

Average UV index in December - Santorini, Greece
  • Average UV index in December: 2

Months with the highest UV index are June and July (UV index 10).
Months with the lowest UV index are January and December (UV index 2).