Winthrop Harbor is located in Lake County, Illinois. There are roughly 5,776 residents, living in 2,201 households. The average temperature for Winthrop Harbor this time of the year is low of 62F and high of 81F. On average, Winthrop Harbor gets about 3.67 inches of precipitation in July. Most residents are home owners (81%), have a post secondary degree (60%) and are married, no kids (36%).
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