Overview: Perros-GuirecPerros-Guirec (France) in general has a mild climate. The day temperatures range from 10 °C (49 °F) in January to 21 °C (70 °F) in July. Sea temperatures are in the following range: 9 °C (49 °F) in March to 17 °C (62 °F) in August. The least rainy month in Perros-Guirec is July with its 9 days of rain, the rainiest month is November, when it rains 16 days. The highest night temperatures could be experienced in August with 14 °C (56 °F), the lowest in February with 4 °C (40 °F).