Overview: Canary Islands - Spain Canary Islands (Spain) is a region with a tropical climate. The day temperatures range from 20 °C (69 °F) in January to 28 °C (83 °F) in August. The highest sea temperatures in Canary Islands are in September with 23 °C (74 °F) and the lowest in March with 19 °C (66 °F). The driest month is July with just 0 days of rain, on the contrary, the month when it rains the most is December with 5 days of rain. Temperatures during the night go from 14 °C (58 °F) in January to 20 °C (69 °F) in September.