Florida climate zones
Florida’s 67 counties fall in 2 IECC 2021 climate zones: 1A (4), 2A (63).
Zone 1A: very hot-humid
Attic target R30 (ENERGY STAR)Broward County (Hot-humid) · Miami-Dade County (Hot-humid) · Monroe County (Hot-humid) · Palm Beach County (Hot-humid)
Zone 2A: hot-humid
Attic target R49 (ENERGY STAR)Alachua County (Hot-humid) · Baker County (Hot-humid) · Bay County (Hot-humid) · Bradford County (Hot-humid) · Brevard County (Hot-humid) · Calhoun County (Hot-humid) · Charlotte County (Hot-humid) · Citrus County (Hot-humid) · Clay County (Hot-humid) · Collier County (Hot-humid) · Columbia County (Hot-humid) · DeSoto County (Hot-humid) · Dixie County (Hot-humid) · Duval County (Hot-humid) · Escambia County (Hot-humid) · Flagler County (Hot-humid) · Franklin County (Hot-humid) · Gadsden County (Hot-humid) · Gilchrist County (Hot-humid) · Glades County (Hot-humid) · Gulf County (Hot-humid) · Hamilton County (Hot-humid) · Hardee County (Hot-humid) · Hendry County (Hot-humid) · Hernando County (Hot-humid) · Highlands County (Hot-humid) · Hillsborough County (Hot-humid) · Holmes County (Hot-humid) · Indian River County (Hot-humid) · Jackson County (Hot-humid) · Jefferson County (Hot-humid) · Lafayette County (Hot-humid) · Lake County (Hot-humid) · Lee County (Hot-humid) · Leon County (Hot-humid) · Levy County (Hot-humid) · Liberty County (Hot-humid) · Madison County (Hot-humid) · Manatee County (Hot-humid) · Marion County (Hot-humid) · Martin County (Hot-humid) · Nassau County (Hot-humid) · Okaloosa County (Hot-humid) · Okeechobee County (Hot-humid) · Orange County (Hot-humid) · Osceola County (Hot-humid) · Pasco County (Hot-humid) · Pinellas County (Hot-humid) · Polk County (Hot-humid) · Putnam County (Hot-humid) · Santa Rosa County (Hot-humid) · Sarasota County (Hot-humid) · Seminole County (Hot-humid) · St. Johns County (Hot-humid) · St. Lucie County (Hot-humid) · Sumter County (Hot-humid) · Suwannee County (Hot-humid) · Taylor County (Hot-humid) · Union County (Hot-humid) · Volusia County (Hot-humid) · Wakulla County (Hot-humid) · Walton County (Hot-humid) · Washington County (Hot-humid)