Geological Survey lists the city's elevation as . Climate The climate of Sugar Hill, as with most of the southeastern United States, is humid subtropical (Cfa) according to the Köppen classification with four seasons, including hot, humid summers and cool winters. July is generally the warmest month of the year with an average high of around . The coldest month is January which has an average high of around . The highest recorded temperature was in 1952, while the lowest recorded temperature was in 1985. Sugar Hill receives abundant rainfall distributed fairly evenly throughout the year, as is typical of southeastern cities, with February on average having the highest average precipitation at , and April typically being the driest month with . Demographics 2020 census As of the 2020 United States census, there were 25,076 people, 7,195 households, and 5,806 families residing in the city. 2010 census As of 2010 Sugar Hill had a population of 18,522, with 6,114 households and 4,832 families residing in the city. The population density was . The racial and ethnic composition of the population was 72.4% white, 9.8% black or African American, 0.3% Native American, 1.3% Asian Indian, 5.0% other Asian, 0.1% Pacific Islander, 8.6% from some other race and 2.5% from two or more races. 19.6% of the population was Hispanic or Latino of any race. Of the city's 6,114 households, 45.2%% had children under the age of 18 living with them, 57.9%% were married couples living together, 13.2%% had a female householder with no husband present, and 22.8% were non-familie households. 18.1% of all households were made up of individuals, and 4.2% had someone living alone who was 65 years of age or older. The average household size was 3.06 and the average family size was 3.46. The median income for a household in the city was $70,106, and the median income for a family was $75,473. Males had a median income of $53,890 versus $37,991 for females. The per capita income for the city was $27,119. About 9.3% of families and 12.4% of the population were below the poverty line, including 17.4% of those under age 18 and 4.0% of those age 65 or over. After the 2000 census the city's growth was ranked 75 out of the 100 highest growing cities in the nation, and one of the 20 fastest growing in the state of Georgia and is Gwinnett County's