Greece
Kefalonia in December: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Kefalonia in December is climatically mixed. The average daily high is around 15 °C, and the sea is about 18 °C. With about 14 rainy days it is wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
41/100 · #10
Warmth
#9
Dryness
#12
Sun
#12
Sea warmth
#8
Published best categories: none
Kefalonia · DecemberPhoto: Tony Hisgett from Birmingham, UK · CC BY 2.0Climate facts
- Average high
- 15 °C
- Average low
- 13 °C
- Sea
- 18 °C
- Rainy days (est.)
- 14 rainy days (est.)
- Sun (est.)
- 2 h/day
- Humidity
- 75 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| November | 19 | 17 | 13 | 136 | 2.9 | 74 | 4.8 | 20 | 59 |
| December (selected) | 15 | 13 | 14 | 138 | 2.2 | 75 | 5.0 | 18 | 41 |
| January | 14 | 11 | 13 | 107 | 2.6 | 75 | 5.0 | 16 | 38 |
How do the previous and next months compare?
Baseline: December (41/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| November | +18 | +3.5 °C | +3.4 °C | -0.9 | -2 mm | +0.7 h | -0.5 % | -0.2 m/s | +2.7 °C |
| January | -3 | -1.6 °C | -1.7 °C | -1.3 | -31 mm | +0.4 h | +0.3 % | ±0 m/s | -1.7 °C |
All twelve months in context
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Where to stay in Kefalonia
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Useful next decisions
Frequently asked questions
How warm is Kefalonia in December?
The average daily high is around 15 °C, with an average daily low of about 13 °C.
Can you swim in Kefalonia in December?
The sea is about 18 °C (cold).
Does it rain a lot in Kefalonia in December?
The curated estimate is about 14 rainy days per month, not a directly measured long-term average. Total precipitation averages around 138 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Kefalonia?
By the climate score, June, July, August and September are the strongest months for Kefalonia. For a beach trip: June, July, August and September. December is not among them.