The climate in Spétses, Attica is usually very warm. The annual average temperature amounts 18.0 °C (64.4 °F). Furthermore, the different seasons distinguish significantly in their temperatures. With an average temperature of 26.5 °C (79.7 °F) July is the warmest month. In January temperatures only reach 10.3 °C (50.5 °F) on average. Following this, the difference between the months amounts 16.2 °C (29.16 °F). During the whole year a total precipitation of 504 mm (19.8 in) on average falls in Spétses. The seasons have a signifant influence on the amount of precipitation. With a total precipitation of 96.0 mm (3.8 in) on average December is the wettest month. July only experiences an average precipitation of 3.0 mm (0.1 in) in most years. According to that, the margin between the two months amounts 93.0 mm (3.7 in).