Argostoli weather in December 2026

Q: How warm is it in Argostoli in December?

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

Q: How sunny is it in Argostoli in December?

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

Q: How warm is the sea around Argostoli in December?

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

Q: Does it rain in Argostoli in December?

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

Expect daytime maximum temperatures of 15°C in Argostoli, Kefalonia 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
15°C max day temperature
4
4 hours of sunshine per day
15
15 days with some rainfall
8
8°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
187
187 mm of monthly rainfall
2
2 (Low) UV index
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.

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