sentences:  In recent years, average temperatures in the county seat of Waterloo have ranged from a low of in January to a high of in July, although a record low of was recorded in December 1989 and a record high of was recorded in August 1962.Average monthly precipitation ranged from in January to in July.As of the 2010 United States Census, there were 32,957 people, 12,589 households, and 9,375 families residing in the county.