Surface runoff
The climate is classified as "dry summer subtropical", or Mediterranean. Rainfall varies from throughout the range. Most of the precipitation falls during the winter on the higher mountains in the north. During the summer, fog and low clouds are frequent along the coast up to an elevation of 2–3,000 feet. Surface runoff from rainfall is rapid, and many streams dry up entirely in the summer, except for some perennial streams in the wetter areas in the north.