what time zone is fresno ca?
Pacific Time Zone
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 Among major U.S. cities , San Francisco has the coolest daily mean , maximum , and minimum temperatures for June , July , and August . During the summer , rising hot air in California 's interior valleys creates a low pressure area that draws winds from the North Pacific High through the Golden Gate , which creates the city 's characteristic cool winds and fog . The fog is less pronounced in eastern neighborhoods and during the late summer and early fall , which is the warmest time of the year . 

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 The San Francisco Bay Area is the sixth @-@ largest TV market and the fourth @-@ largest radio market in the U.S. The city 's oldest radio station , KCBS ( AM ) , began as an experimental station in San Jose in 1909 , before the beginning of commercial broadcasting . KALW was the city 's first FM radio station when it signed on the air in 1941 . The city 's first television station was KPIX , which began broadcasting in 1948 . 

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 The state of California is located on the Pacific Ring of Fire , an area of highly active tectonic activity that includes seismicity and volcanism . Tehama and the other volcanoes near Lassen Peak were produced by subduction of the oceanic Pacific Plate under the North American Plate . 

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 The city is also a landing point on three fiber optic cable systems linking the United States across the Pacific Ocean : C2C , Southern Cross Cable , and VSNL Transpacific . These cable landings , lower energy costs , and tax breaks led to a boom of data centers being built starting about 2010 . Data centers include those for Adobe , NetApp , Umpqua Bank , OHSU , and Fortune Data Centers . 

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 San Francisco ( / sæn frənˈsɪskoʊ / ) , officially the City and County of San Francisco , is the cultural , commercial , and financial center of Northern California and the only consolidated city @-@ county in California . San Francisco encompasses a land area of about 46 @.@ 9 square miles ( 121 km2 ) on the northern end of the San Francisco Peninsula , which makes it the smallest county in the state . It has a density of about 18 @,@ 451 people per square mile ( 7 @,@ 124 people per km2 ) , making it the most densely settled large city ( population greater than 200 @,@ 000 ) in the state of California and the second @-@ most densely populated major city in the United States after New York City . San Francisco is the fourth @-@ most populous city in California , after Los Angeles , San Diego , and San Jose , and the 13th @-@ most populous city in the United States — with a Census @-@ estimated 2015 population of 864 @,@ 816 . The city and its surrounding areas are known as the San Francisco Bay Area , and are a part of the larger OMB @-@ designated San Jose @-@ San Francisco @-@ Oakland combined statistical area , the fifth most populous in the nation with an estimated population of 8 @.@ 7 million . 
