The Mediterranean climate, characterised by warm and dry summers. It is dominant in the peninsula, with two varieties: Csa and Csb according to the Köppen climate classification. The Csb Zone, with a more extreme climate, hotter in summer and colder in winter, extends to additional areas not typically associated with a Mediterranean climate, such as much of central and northern-central of Spain (e.g. Valladolid, Burgos, León).