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Kefalonia 
Weather in December 2025
The temperatures in Kefalonia in December are usually low and can range between 14°C and 16°C.
You can expect about 3 to 8 days of rain in Kefalonia during the month of December. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Kefalonia in December 2025.
If you’re planning to visit Kefalonia in the near future, we highly recommend that you review the 14 day weather forecast for Kefalonia before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 14° / 12° | 7 | 24 | 0 | 138 mm | Ok | Kefalonia in January |
| February | 14° / 12° | 5 | 23 | 0 | 108 mm | Good | Kefalonia in February |
| March | 15° / 13° | 4 | 27 | 0 | 75 mm | Good | Kefalonia in March |
| April | 17° / 15° | 2 | 28 | 0 | 41 mm | Good | Kefalonia in April |
| May | 20° / 19° | 1 | 30 | 0 | 25 mm | Good | Kefalonia in May |
| June | 24° / 22° | 1 | 29 | 0 | 30 mm | Perfect | Kefalonia in June |
| July | 26° / 25° | 1 | 30 | 0 | 8 mm | Perfect | Kefalonia in July |
| August | 28° / 26° | 0 | 31 | 0 | 6 mm | Perfect | Kefalonia in August |
| September | 25° / 24° | 4 | 26 | 0 | 107 mm | Perfect | Kefalonia in September |
| October | 22° / 21° | 7 | 24 | 0 | 155 mm | Ok | Kefalonia in October |
| November | 19° / 18° | 6 | 24 | 0 | 155 mm | Good | Kefalonia in November |
| December | 16° / 14° | 6 | 25 | 0 | 129 mm | Good | Kefalonia in December |