Duluth. Duluth has a humid subtropical climate (Cfa.) The monthly averages range from 41.0 °F in January to 78.3° in July. The local hardiness zone is 7b. Demographics 2020 census As of the 2020 United States census, there were 31,873 people, 11,202 households, and 7,634 families residing in the city. 2010 census As of the census of 2010, there were 26,600 people, 10,555 households, and 6,872 families residing in the city. The population density was . There were 11,313 housing units at an average density of . The racial makeup of the city was 48.7% White, 20.2% African American, 0.4% Native American, 22.3% Asian, 0.1% Pacific Islander, 5.2% from other races, and 3.1% from two or more races. Hispanic or Latino of any race were 14.0% of the population. There were 10,555 households, out of which 33.9% had children under the age of 18 living with them, 46.6% were married couples living together, 14.1% had a female householder with no husband present, and 34.9% were non-families. 28.4% of all households were made up of individuals, and 5.0% had someone living alone who was 65 years of age or older. The average household size was 2.52 and the average family size was 3.10. In age 18 and over, for every 100 females, there were 87.9 males. The average income for a household in the city was $60,088, and the median income for a family was $69,437. Males had a median income of $46,683 versus $34,334 for females. The per capita income for the city was $29,185. About 3.0% of families and 4.4% of the population were below the poverty line, including 4.8% of those under age 18 and 3.2% of those age 65 or over. Economy Businesses Advanced Armament Corporation AGCO Asbury Automotive Group Barco Broadcom Ciba Vision Datapath, Inc. (formerly Rockwell Collins Satellite Communication Systems, Inc.) General Dynamics SATCOM Tech (formerly) Given Imaging Merial Animal Health Nordson Primerica Roper Industries Tetra Tech ViaSat Tourism Downtown Duluth boasts a thriving business district; There are many shops and dining choices to choose from. Every year the city hosts an annual Fall Festival on the last weekend of every September, which is held in the town center. The Southeastern Railway Museum is located in Duluth, and is Georgia's official transportation museum. Sports The Atlanta Gladiators, formerly the Gwinnett Gladiators, of the ECHL, a professional minor league ice hockey team, plays in the Gas