Foster City is located in San Mateo County, California. There are roughly 31,060 residents, living in 12,190 households. The average temperature for Foster City this time of the year is low of 50F and high of 64F. On average, Foster City gets about 0.53 inches of precipitation in May. Most residents are home owners (57%), have a post secondary degree (63%) and are single, no kids (35%).
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