Santorini weather in December 2025

Expect daytime maximum temperatures of 16°C in Santorini in December based on long-term weather averages. There are 4 hours of sunshine per day on average with 12 days with some rainfall and typically 102 mm of rainfall in the month.

  • 16°C maximum daytime temperature in December in Santorini (Thira)16
    16°C max day temperature
  • 4 hours of sunshine per day
  • 12 days with some rainfall in December in Santorini (Thira)12
    12 days with some rainfall
  • 11°C minimum night-time temperature in December in Santorini (Thira)11
    11°C min night temperature
  • 10 hours of daylight per day in December in Santorini (Thira)10
    10 hours of daylight per day
  • No heat & humidity in December in Santorini (Thira)0
    No heat & humidity
  • 102 mm monthly rainfall in December in Santorini (Thira)102
    102 mm of monthly rainfall
  • UV (maximum) index 2 (Low) in December in Santorini (Thira)2
    2 (Low) UV index
  • 17°C sea temperature in December in Santorini (Thira)17
    17°C sea temperature

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The December weather guide for Santorini (Thira) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Top Santorini destinations

Below are average maximum temperatures at popular countries, regions and places in Santorini in December. Select a holiday destination to see more weather parameters.

All Santorini destinations

Metric (°C / mm)  |  Imperial (°F / inches)

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How warm is it in Santorini in December?

Daytime temperatures usually reach 16°C in Thira, Santorini in December, falling to 11°C at night.

How sunny is it in Santorini in December?

There are normally 4 hours of bright sunshine each day in Thira, Santorini in December - that's 44% of daylight hours.

How warm is the sea around Santorini in December?

The average sea temperature around Thira, Santorini in December is 17°C.

Does it rain in Santorini in December?

There are usually 12 days with some rain in Thira, Santorini in December and the average monthly rainfall is 102mm.

Santorini December sunrise & sunset times

Browse the sunrise and sunset times for Santorini in December 2025. Select a month to view Santorini sunrise and sunset times for the next 12 months. The Santorini sunrise and sunset times shown below are for Thira.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 07:11 17:03
Tuesday, 16th December 2025 07:23 17:05
Wednesday, 31st December 2025 07:30 17:13

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