San Francisco in the United States and Temuco in Chile are also in the coastal areas on the west coast of the mainland. Why is there much precipitation in Oleaceae?

San Francisco and Tiemuke belong to the Mediterranean climate, with roughly the same latitude. But San Francisco is located in the southwest of the United States, and the precipitation in the United States actually decreases from east to west, so there is less precipitation in San Francisco. The ironwood family is located on the windward slope, so there is more precipitation.