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IECC 2021 · PNNL

South Carolina climate zones

South Carolina’s 46 counties fall in 2 IECC 2021 climate zones: 2A (2), 3A (44).

Zone 2A: hot-humid

Attic target R49 (ENERGY STAR)

Beaufort County (Hot-humid) · Jasper County (Hot-humid)

Zone 3A: warm-humid

Attic target R49 (ENERGY STAR)

Abbeville County (Mixed-humid) · Aiken County (Mixed-humid) · Allendale County (Hot-humid) · Anderson County (Mixed-humid) · Bamberg County (Hot-humid) · Barnwell County (Hot-humid) · Berkeley County (Hot-humid) · Calhoun County (Mixed-humid) · Charleston County (Hot-humid) · Cherokee County (Mixed-humid) · Chester County (Mixed-humid) · Chesterfield County (Mixed-humid) · Clarendon County (Mixed-humid) · Colleton County (Hot-humid) · Darlington County (Mixed-humid) · Dillon County (Mixed-humid) · Dorchester County (Hot-humid) · Edgefield County (Mixed-humid) · Fairfield County (Mixed-humid) · Florence County (Mixed-humid) · Georgetown County (Hot-humid) · Greenville County (Mixed-humid) · Greenwood County (Mixed-humid) · Hampton County (Hot-humid) · Horry County (Hot-humid) · Kershaw County (Mixed-humid) · Lancaster County (Mixed-humid) · Laurens County (Mixed-humid) · Lee County (Mixed-humid) · Lexington County (Mixed-humid) · Marion County (Mixed-humid) · Marlboro County (Mixed-humid) · McCormick County (Mixed-humid) · Newberry County (Mixed-humid) · Oconee County (Mixed-humid) · Orangeburg County (Mixed-humid) · Pickens County (Mixed-humid) · Richland County (Mixed-humid) · Saluda County (Mixed-humid) · Spartanburg County (Mixed-humid) · Sumter County (Mixed-humid) · Union County (Mixed-humid) · Williamsburg County (Mixed-humid) · York County (Mixed-humid)