Portola Valley is located in San Mateo County, California. There are roughly 4,190 residents, living in 1,668 households. The average temperature for Portola Valley this time of the year is low of 47F and high of 72F. On average, Portola Valley gets about 0.81 inches of precipitation in May. Most residents are home owners (79%), have a post secondary degree (55%) and are married, no kids (39%).
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