Keystone is located in Benton County, Iowa. There are roughly 11 residents, living in 5 households. The average temperature for Keystone this time of the year is low of 60F and high of 83F. On average, Keystone gets about 4.54 inches of precipitation in August. Most residents are home owners (83%), have a post secondary degree (59%) and are single, no kids (35%).
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