Generally the typical temperate in Kallithea during May is 18. Average highs are typically 24 and low average expected to be 15. See our table below for a full breakdown:
| Month | Degrees Celsius |
|---|---|
| Temperature | 18 |
| High Temperature | 24 |
| Low Temperature | 15 |
| Sunshine Per Day | 11 |
Useful Links: Kallithea Weather: Average Weather & Yearly Climate