The Basque mountains form the water divide and mark also the
distinct climatic areas of the Basque Country: The northern valleys, in
Bizkaia and Gipuzkoa and also the valley of Ayala in Álava, are part of the Green Spain, where oceanic climate is predominant, with its wet weather all year round and moderate temperatures. Precipitation average is about 1200 mm.
The middle section has a more Continental Mediterranean climate, but with some influence of the northern oceanic one, this causes dry and warm summers and cold and snowy winters. The Ebro valley has a pure Continental Mediterranean climate, winters are cold and dry and summers very warm and dry, with precipitation peaking in spring and autumn. Precipitation is scarce and irregular, as low as 300 mm.
