Normally, average daily temperatures in Kefalonia during the duration of May is 16 with usual highs being around 22 and low around 12. The table below has further info:
| Month | Degrees Celsius |
|---|---|
| Temperature | 16 |
| High Temperature | 22 |
| Low Temperature | 12 |
| Sunshine Per Day | 10 |
Useful Links: Kefalonia Weather: Average Weather & Yearly Climate