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IECC 2021 · PNNL

West Virginia climate zones

West Virginia’s 55 counties fall in 2 IECC 2021 climate zones: 4A (36), 5A (19).

Zone 4A: mixed-humid

Attic target R60 (ENERGY STAR)

Berkeley County (Mixed-humid) · Boone County (Mixed-humid) · Braxton County (Mixed-humid) · Cabell County (Mixed-humid) · Calhoun County (Mixed-humid) · Clay County (Mixed-humid) · Doddridge County (Mixed-humid) · Fayette County (Mixed-humid) · Gilmer County (Mixed-humid) · Greenbrier County (Mixed-humid) · Jackson County (Mixed-humid) · Jefferson County (Mixed-humid) · Kanawha County (Mixed-humid) · Lewis County (Mixed-humid) · Lincoln County (Mixed-humid) · Logan County (Mixed-humid) · Mason County (Mixed-humid) · McDowell County (Mixed-humid) · Mercer County (Mixed-humid) · Mingo County (Mixed-humid) · Monroe County (Mixed-humid) · Morgan County (Mixed-humid) · Nicholas County (Mixed-humid) · Pleasants County (Mixed-humid) · Putnam County (Mixed-humid) · Raleigh County (Mixed-humid) · Ritchie County (Mixed-humid) · Roane County (Mixed-humid) · Summers County (Mixed-humid) · Tyler County (Mixed-humid) · Upshur County (Mixed-humid) · Wayne County (Mixed-humid) · Webster County (Mixed-humid) · Wirt County (Mixed-humid) · Wood County (Mixed-humid) · Wyoming County (Mixed-humid)

Zone 5A: cool-humid

Attic target R60 (ENERGY STAR)

Barbour County (Cold) · Brooke County (Cold) · Grant County (Cold) · Hampshire County (Cold) · Hancock County (Cold) · Hardy County (Cold) · Harrison County (Cold) · Marion County (Cold) · Marshall County (Cold) · Mineral County (Cold) · Monongalia County (Cold) · Ohio County (Cold) · Pendleton County (Cold) · Pocahontas County (Cold) · Preston County (Cold) · Randolph County (Cold) · Taylor County (Cold) · Tucker County (Cold) · Wetzel County (Cold)