Arkansas climate zones
Arkansas’s 75 counties fall in 2 IECC 2021 climate zones: 3A (63), 4A (12).
Zone 3A: warm-humid
Attic target R49 (ENERGY STAR)Arkansas County (Mixed-humid) · Ashley County (Mixed-humid) · Bradley County (Mixed-humid) · Calhoun County (Mixed-humid) · Chicot County (Mixed-humid) · Clark County (Mixed-humid) · Clay County (Mixed-humid) · Cleburne County (Mixed-humid) · Cleveland County (Mixed-humid) · Columbia County (Hot-humid) · Conway County (Mixed-humid) · Craighead County (Mixed-humid) · Crawford County (Mixed-humid) · Crittenden County (Mixed-humid) · Cross County (Mixed-humid) · Dallas County (Mixed-humid) · Desha County (Mixed-humid) · Drew County (Mixed-humid) · Faulkner County (Mixed-humid) · Franklin County (Mixed-humid) · Garland County (Mixed-humid) · Grant County (Mixed-humid) · Greene County (Mixed-humid) · Hempstead County (Mixed-humid) · Hot Spring County (Mixed-humid) · Howard County (Mixed-humid) · Independence County (Mixed-humid) · Jackson County (Mixed-humid) · Jefferson County (Mixed-humid) · Johnson County (Mixed-humid) · Lafayette County (Hot-humid) · Lawrence County (Mixed-humid) · Lee County (Mixed-humid) · Lincoln County (Mixed-humid) · Little River County (Hot-humid) · Logan County (Mixed-humid) · Lonoke County (Mixed-humid) · Miller County (Hot-humid) · Mississippi County (Mixed-humid) · Monroe County (Mixed-humid) · Montgomery County (Mixed-humid) · Nevada County (Mixed-humid) · Ouachita County (Mixed-humid) · Perry County (Mixed-humid) · Phillips County (Mixed-humid) · Pike County (Mixed-humid) · Poinsett County (Mixed-humid) · Polk County (Mixed-humid) · Pope County (Mixed-humid) · Prairie County (Mixed-humid) · Pulaski County (Mixed-humid) · Randolph County (Mixed-humid) · Saline County (Mixed-humid) · Scott County (Mixed-humid) · Sebastian County (Mixed-humid) · Sevier County (Mixed-humid) · Sharp County (Mixed-humid) · St. Francis County (Mixed-humid) · Union County (Hot-humid) · Van Buren County (Mixed-humid) · White County (Mixed-humid) · Woodruff County (Mixed-humid) · Yell County (Mixed-humid)
Zone 4A: mixed-humid
Attic target R60 (ENERGY STAR)Baxter County (Mixed-humid) · Benton County (Mixed-humid) · Boone County (Mixed-humid) · Carroll County (Mixed-humid) · Fulton County (Mixed-humid) · Izard County (Mixed-humid) · Madison County (Mixed-humid) · Marion County (Mixed-humid) · Newton County (Mixed-humid) · Searcy County (Mixed-humid) · Stone County (Mixed-humid) · Washington County (Mixed-humid)