SeasonMapKefalonia weather in December
Greece
December in Kefalonia: cool, rainy, with clean air — a fair time to visit.
#11 of 12 months in Kefalonia · #1028 of 1383 destinations to visit in December · comfort 56/100 (tier D)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Kefalonia in December
Other months in Kefalonia
Kefalonia's forum puts August around 30°C in the shade with roughly 12 hours of sunshine a day, capable of hitting 40°C on the hottest days especially early in the month. Regulars describe the classic siesta rhythm — sightseeing before 11:30am, shade and a long lunch through the peak heat, back out around 4pm — and note the Greek heat feels notably less oppressive than a 30°C day in a humid climate.
Add your own note from Kefalonia's card on the map.
Kefalonia climate normals — December
| Daytime high | 17°C / 62°F | 🙂 cool |
|---|---|---|
| Nighttime low | 11°C / 51°F | |
| Feels like (high) | 14°C / 57°F | |
| Sea temperature | 18°C / 65°F | 🧊 bracing |
| Rainfall | 146 mm / 5.8 in | 🌧 rainy |
| Rainy days | 13 days | |
| Humidity | 70% | 💧 humid |
| Dew point | 10°C / 50°F | |
| Sunshine | 7.2 h/day | |
| Daylight | 9.6 h | |
| Wind | 32 km/h / 20 mph | |
| Air quality (US AQI) | 42 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Kefalonia in December
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusyChristmas holidays in Greece, school holidays in 7 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Kefalonia's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Toughest weatherKefalonia's weather peaks June–August, best around July.
Best weatherFair weatherToughest weather
What's on in Kefalonia in December
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Out of season
20 Oct – 15 AprOff-season shutdownClosuresCharter flights stop, the resorts board up and the ferry timetable thins to a couple of sailings a day. Argostoli and Lixouri stay open; the beach villages do not.
Nearby, and something's on
Within 300 km of Kefalonia — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Kefalonia?
Kefalonia in December — FAQ
- Is December a good time to visit Kefalonia?
- December in Kefalonia: cool, rainy, with clean air — a fair time to visit. It ranks #11 of 12 months for Kefalonia on SeasonMap's comfort score (56/100).
- What is the weather like in Kefalonia in December?
- In December, Kefalonia averages a daily high of 16.9°C and a low of 10.6°C, with about 146.3 mm of rain over roughly 13.3 rainy days.
- What is the air quality in Kefalonia in December?
- Kefalonia has a mean US Air Quality Index of about 42 in December.
Other months in Kefalonia
Compare Kefalonia in December
Warmer or cooler than Kefalonia in December
Similar destinations in Southern Europe — December
Within 300 km: Corfu's Olive harvest around 1 Nov – 28 Feb, and Zakynthos' Out of season on 1 Nov – 31 Mar.