A popular quote incorrectly attributed to
Mark Twain is "The coldest winter I ever spent was a summer in San
Francisco". San Francisco's climate is characteristic of the cool-summer
Mediterranean climate (Csb) of California’s coast, "generally
characterized by moist mild winters and dry summers". Since it is
surrounded on three sides by water, San Francisco's weather is strongly
influenced by the cool currents of the Pacific Ocean, which moderate
temperature swings and produce a remarkably mild year-round climate with little
seasonal temperature variation.
