Overview: BilbaoBilbao (Spain) is a place with a mild climate. Temperatures during the day are in the range from 11 °C (51 °F) in January to 24 °C (75 °F) in August. The highest night temperatures could be experienced in August with 16 °C (61 °F), the lowest in January with 5 °C (41 °F). The least rainy month in Bilbao is July with its 8 days of rain, the rainiest month is November, when it rains 14 days.