 The climate in this area is characterized by hot, humid summers and generally mild to cool winters.According to the Köppen Climate Classification system, Malvern has a humid subtropical climate, abbreviated "Cfa" on climate maps.As of the census of 2000, there were 9,021 people, 3,769 households, and 2,431 families residing in the city, and its population density was 1,227.1 people per square mile (473.9/km²).