Simpsonville, in South Carolina, United States, is home to roughly 20,700 people in the Eastern Time Zone at 34.7°N latitude.
In 2025, Simpsonville recorded an average annual temperature of 62°F — about 1.7°F below the 30-year normal of 63°F. The hottest day reached 100°F in July; the coldest was 16°F in January. Total precipitation was 36 inches (drier than usual). The wettest month was May.
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