Cool in Dec
19°C average high
avg high · 8° at night
25°C+ on rarely
Greece
Kefalonia weather in December
Is it warm? Not really. December in Kefalonia is cool: afternoons average 17°C and nights 10°C. Most days (80%) peak between 14°C and 19°C.
Cool · average high
17°C
25°C or more on almost no days; 20°C or more on fewer than one day in ten.
- Average low10°overnight
- Sea18°average, 2022–2025
- Rainy days11151 mm in the month
- SkyOften cloudy49% cloud · 27% clear days
How warm it really gets
Every December afternoon from 2011–2025: 465 days. Most (80%) peaked between 14° and 19°.
December, year by year
The average December high in each year. The warmest, 2022, averaged 19°C; the coolest, 2016, 15°C.
Compared with home
Average December highs. Expect rain on about 11 days (151 mm in a typical month).
- Kefalonia17°
- Cork10°
- London10°
- Dublin9°
- Belfast9°
- Manchester9°
- Glasgow8°
Warmer in December, not much further
Flying times are estimates from Dublin; Kefalonia is about 3h 45m.
Cool in Dec
18°C average high
avg high · 9° at night
25°C+ on rarely
Cool in Dec
18°C average high
avg high · 11° at night
25°C+ on rarely
Air: Copernicus ERA5-Land, 2011–2025, matched to the official averages for Kefalonia airport. Sea: Copernicus ERA5, 2022–2025. Rainy days = days with 1 mm of rain or more, as weather stations count them. Clear day = average cloud cover of 30% or less. These are averages of past weather, not a forecast. Methodology