Generally the liquid is water and the fluid above the liquid is air. The molecules within the liquid attract each other and at the interface there are more attractive forces towards the bulk of the liquid than there are towards the adjacent gas molecules. The molecular forces tend to pull into the fluid bulk.
Weather lowdown. Despite the fact that the month of September in Athens can produce summer-like temperatures, the weather starts to cool off significantly in October, and especially at night. The average temperature this month is 19Â°C (66Â°F), while the average low is 15Â°C (59Â°C), and the average high is 23Â°C (73Â°F).
Weather lowdown. Temperatures in Athens in July reached their highest point for the year, and they donât cool off much in August. The average temperature this month is 27Â°C (81Â°F), which is the same as it was in July, while the average low is 22Â°C (72Â°F), and the average high is just slightly lower than in July at 31Â°C (88Â°F).