Lake San Marcos is located in San Marcos, California. There are roughly 4,784 residents, living in 2,146 households. The average temperature for Lake San Marcos this time of the year is low of 59F and high of 83F. On average, Lake San Marcos gets about 0.03 inches of precipitation in July. Most residents are home owners (73%), have a post secondary degree (66%) and are single, no kids (43%).
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