With a population of around 40,800, Sumter sits in South Carolina, United States. The city operates in the Eastern Time Zone.
Recent weather here gives a sense of typical conditions: in 2025, Sumter recorded a mean annual temperature of 65°F, ranging from 19°F lows in December to 103°F highs in July, with about 40 inches of precipitation across the year.
View historical weather for Sumter · More cities in South Carolina