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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 65F and high of 82F. On average, East Setauket gets about 3.7 inches of precipitation in July. Most residents are home owners (91%), have a post secondary degree (54%) and are married, no kids (36%).