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East Setauket is located in Suffolk County, New York. There are roughly 19,101 residents, living in 6,337 households. The average temperature for East Setauket this time of the year is low of 49F and high of 68F. On average, East Setauket gets about 4 inches of precipitation in May. Most residents are home owners (91%), have a post secondary degree (54%) and are married, no kids (36%).