Kefalonia, Greece: vitamin D, best months and travel guide
Mountainous Ionian island with famous pale beaches. Best for: couples, drivers, families.
The best months for vitamin D in Kefalonia are April to October, when a full dose takes about 7 minutes at midday. Too cool from November to March.
Kefalonia month by month
| Month | Rating | Sun window | Peak UV | Full dose, age 30 | Afternoon high | Rainy days |
|---|---|---|---|---|---|---|
| January | Too cold | 2.5 h | 2.9 | 18 min | 15°C | 10/30 |
| February | Too cold | 4.6 h | 3.9 | 14 min | 16°C | 9/30 |
| March | Too cold | 6.8 h | 5.7 | 9 min | 17°C | 9/30 |
| April | Excellent | 8.1 h | 7.0 | 8 min | 22°C | 3/30 |
| May | Excellent | 8.6 h | 7.3 | 7 min | 24°C | 5/30 |
| June | Excellent | 9.6 h | 8.2 | 7 min | 32°C | 0/30 |
| July | Excellent | 9.7 h | 8.1 | 7 min | 34°C | 0/30 |
| August | Excellent | 9.0 h | 7.7 | 7 min | 33°C | 4/30 |
| September | Good | 7.6 h | 6.4 | 8 min | 27°C | 8/30 |
| October | Good | 5.9 h | 4.9 | 11 min | 24°C | 2/30 |
| November | Too cold | 3.5 h | 3.4 | 16 min | 19°C | 11/30 |
| December | Too cold | 1.6 h | 2.6 | 21 min | 15°C | 15/30 |
Sun window is the number of hours a day with UV Index 2.5 or higher. Full dose is the minutes at midday for about 1,000 IU of vitamin D with a quarter of the body bare, for skin type III. Rainy days are days with at least 1 mm out of 30.
What to expect in Kefalonia
Mountainous Ionian island with famous pale beaches. Hot, dry summers and a strong northern wind (the meltemi) in July and August. Many island hotels close and ferries run less often from November to March. May, June and September give good sun with fewer people.
In Kefalonia afternoon highs average from 15°C in January to 34°C in July. The wettest month is December (about 15 rainy days out of 30) and the driest is July (0). Midday UV peaks at 8.2 in June, which is very strong, so protect your skin.
Questions about Kefalonia
When is the best time to visit Kefalonia for vitamin D?
The best months for vitamin D in Kefalonia are April to October, when a full dose takes about 7 minutes at midday.
What is the weather like in Kefalonia?
Afternoon highs average from 15°C in January to 34°C in July. The wettest month is December, with about 15 rainy days out of 30.
Which months should I avoid in Kefalonia?
For a beach stay, avoid the months when it is too cool from November to March.