Alabama climate zones
Alabama’s 67 counties fall in 2 IECC 2021 climate zones: 2A (9), 3A (58).
Zone 2A: hot-humid
Attic target R49 (ENERGY STAR)Baldwin County (Hot-humid) · Coffee County (Hot-humid) · Covington County (Hot-humid) · Dale County (Hot-humid) · Escambia County (Hot-humid) · Geneva County (Hot-humid) · Henry County (Hot-humid) · Houston County (Hot-humid) · Mobile County (Hot-humid)
Zone 3A: warm-humid
Attic target R49 (ENERGY STAR)Autauga County (Hot-humid) · Barbour County (Hot-humid) · Bibb County (Mixed-humid) · Blount County (Mixed-humid) · Bullock County (Hot-humid) · Butler County (Hot-humid) · Calhoun County (Mixed-humid) · Chambers County (Mixed-humid) · Cherokee County (Mixed-humid) · Chilton County (Mixed-humid) · Choctaw County (Hot-humid) · Clarke County (Hot-humid) · Clay County (Mixed-humid) · Cleburne County (Mixed-humid) · Colbert County (Mixed-humid) · Conecuh County (Hot-humid) · Coosa County (Mixed-humid) · Crenshaw County (Hot-humid) · Cullman County (Mixed-humid) · Dallas County (Hot-humid) · DeKalb County (Mixed-humid) · Elmore County (Hot-humid) · Etowah County (Mixed-humid) · Fayette County (Mixed-humid) · Franklin County (Mixed-humid) · Greene County (Mixed-humid) · Hale County (Mixed-humid) · Jackson County (Mixed-humid) · Jefferson County (Mixed-humid) · Lamar County (Mixed-humid) · Lauderdale County (Mixed-humid) · Lawrence County (Mixed-humid) · Lee County (Mixed-humid) · Limestone County (Mixed-humid) · Lowndes County (Hot-humid) · Macon County (Hot-humid) · Madison County (Mixed-humid) · Marengo County (Hot-humid) · Marion County (Mixed-humid) · Marshall County (Mixed-humid) · Monroe County (Hot-humid) · Montgomery County (Hot-humid) · Morgan County (Mixed-humid) · Perry County (Hot-humid) · Pickens County (Mixed-humid) · Pike County (Hot-humid) · Randolph County (Mixed-humid) · Russell County (Hot-humid) · Shelby County (Mixed-humid) · St. Clair County (Mixed-humid) · Sumter County (Mixed-humid) · Talladega County (Mixed-humid) · Tallapoosa County (Mixed-humid) · Tuscaloosa County (Mixed-humid) · Walker County (Mixed-humid) · Washington County (Hot-humid) · Wilcox County (Hot-humid) · Winston County (Mixed-humid)