in size and enrollment and by the fall of 1887 the school had eight school rooms, a teaching staff of 10, and 416 pupils enrolled. Audubon was a well-established city by 1900, and growth slowed after that. In 1915 the city was recorded to have a public library, 9 lawyers, 10 medical professionals, 3 veterinarians, 7 clergymen, 4 bankers and many other businesses. Audubon was a RAGBRAI overnight stop in 1986 and 2006. Geography Audubon's longitude and latitude coordinates in decimal form are 41.720323, −94.928422. According to the United States Census Bureau, the city has a total area of , all of it land. Climate According to the Köppen Climate Classification system, Audubon has a hot-summer humid continental climate, abbreviated "Dfa" on climate maps. Demographics 2010 census At the 2010 census there were 2,176 people, 961 households, and 586 families living in the city. The population density was . There were 1,106 housing units at an average density of . The racial makup of the city was 98.9% White, 0.2% African American, 0.3% Native American, 0.2% Asian, and 0.3% from two or more races. Hispanic or Latino of any race were 0.7%. Of the 961 households 26.0% had children under the age of 18 living with them, 48.4% were married couples living together, 8.5% had a female householder with no husband present, 4.1% had a male householder with no wife present, and 39.0% were non-families. 36.6% of households were one person and 22% were one person aged 65 or older. The average household size was 2.18 and the average family size was 2.82. The median age was 47.5 years. 21.9% of residents were under the age of 18; 5.4% were between the ages of 18 and 24; 19.5% were from 25 to 44; 24.6% were from 45 to 64; and 28.5% were 65 or older. The gender makeup of the city was 46.5% male and 53.5% female. 2000 census At the 2000 census there were 2,382 people, 1,035 households, and 646 families living in the city. The population density was . There were 1,107 housing units at an average density of . The racial makup of the city was 99.33% White, 0.25% African American, and 0.42% from two or more races. Hispanic or Latino of any race were 0.34%. Of the 1,035 households 24.9% had children under the age of 18 living with them, 54.0% were married couples living together,