The climate of the Santiago Province, and generally of the Metropolitan Region is temperate Mediterranean cold, of the kind called "continental". Precipitation is concentrated in the winter months, generally as snow over 1000 m above sea level and, in colder years, over the city of Santiago. Winter tends to be cold with frequent frosts during which temperature drops below 0 °C. The summer months are usually dry and hot. The Cordillera de la Costa acts as a climate screen and reduces marine influence, which makes the climate more continental. This situation becomes apparent when comparing precipitation from a coastal location such as Valparaíso (460 mm) with that of Santiago de Chile (360 mm).