Does it get cold at night in Athens? The average temperature is of 25.4 °C (78 °F), with a minimum of 20.5 °C (68.9 °F) and a maximum of 30.3 °C (86.5 °F). On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 16 °C (60.5 °F).