San Francisco Weather

San Francisco occupies the tip of a peninsula halfway up the coast of northern California, surrounded on three sides by bodies of water: the Pacific Ocean, the Golden Gate strait,
and the San Francisco Bay. The city is laid out in a grid over some 40 hills, reaching heights of nearly 1,000 feet; this sometimes causes wide variations in temperature and sky
conditions in different areas of town. The Pacific air keeps the temperatures generally moderate, rarely ranging above 75º or below 45º, leading San Francisco
to be called "the air-conditioned city." The climate is very similar to coastal areas on the Mediterranean.

Although temperatures remain relatively constant, there are two definite seasons—wet and dry—with more than 80 percent of annual precipitation taking place between
November and March. Perhaps the most distinctive feature of the local climate is the banks of fog that can roll in off the ocean, quickly covering various areas of the city, and
then disappear just as quickly. The fog is most common on summer mornings, coming off the cooler ocean and backing up against the hills, but it also comes from the colder
inland areas during the winter. The fog affects different elevations in varying amounts, covering the city in complex patterns of fog and sunshine. It usually burns off in the course
of the day, however typical summer clothes are not appropriate.The marine layer keeps temperatures well below what you may expect for June, July and August. Autumn gives
San Francisco its traditional "summer" weather and it's when we experience our best weather. December through March are our rainy months when the city gets an average of
20 inches of rainfall, so have an umbrella handy. To be most comfortable in the city by the bay, pack a jacket or sweater whenever you plan to visit.

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