Kefalonia weather in December 2025

Expect daytime maximum temperatures of 15°C in Kefalonia, Greece in December based on long-term weather averages. There are 4 hours of sunshine per day on average with 15 days with some rainfall and typically 187 mm of rainfall in the month.

  • 15°C maximum daytime temperature in December in Kefalonia (Argostoli)15
    15°C max day temperature
  • 4 hours of sunshine per day
  • 15 days with some rainfall in December in Kefalonia (Argostoli)15
    15 days with some rainfall
  • 8°C minimum night-time temperature in December in Kefalonia (Argostoli)8
    8°C min night temperature
  • 10 hours of daylight per day in December in Kefalonia (Argostoli)10
    10 hours of daylight per day
  • No heat & humidity in December in Kefalonia (Argostoli)0
    No heat & humidity
  • 187 mm monthly rainfall in December in Kefalonia (Argostoli)187
    187 mm of monthly rainfall
  • UV (maximum) index 2 (Low) in December in Kefalonia (Argostoli)2
    2 (Low) UV index
  • 17°C sea temperature in December in Kefalonia (Argostoli)17
    17°C sea temperature

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The December weather guide for Kefalonia (Argostoli) 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 Kefalonia destinations

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

All Kefalonia destinations

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

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More about Greece

How warm is it in Kefalonia in December?

Daytime temperatures usually reach 15°C in Argostoli, Kefalonia in December, falling to 8°C at night.

How sunny is it in Kefalonia in December?

There are normally 4 hours of bright sunshine each day in Argostoli, Kefalonia in December - that's 45% of daylight hours.

How warm is the sea around Kefalonia in December?

The average sea temperature around Argostoli, Kefalonia in December is 17°C.

Does it rain in Kefalonia in December?

There are usually 15 days with some rain in Argostoli, Kefalonia in December and the average monthly rainfall is 187mm.

Kefalonia December sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 07:36 17:18
Tuesday, 16th December 2025 07:48 17:19
Wednesday, 31st December 2025 07:54 17:28

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