Louisiana climate zones
Louisiana’s 64 counties fall in 2 IECC 2021 climate zones: 2A (37), 3A (27).
Zone 2A: hot-humid
Attic target R49 (ENERGY STAR)Acadia Parish (Hot-humid) · Allen Parish (Hot-humid) · Ascension Parish (Hot-humid) · Assumption Parish (Hot-humid) · Avoyelles Parish (Hot-humid) · Beauregard Parish (Hot-humid) · Calcasieu Parish (Hot-humid) · Cameron Parish (Hot-humid) · East Baton Rouge Parish (Hot-humid) · East Feliciana Parish (Hot-humid) · Evangeline Parish (Hot-humid) · Iberia Parish (Hot-humid) · Iberville Parish (Hot-humid) · Jefferson Davis Parish (Hot-humid) · Jefferson Parish (Hot-humid) · Lafayette Parish (Hot-humid) · Lafourche Parish (Hot-humid) · Livingston Parish (Hot-humid) · Orleans Parish (Hot-humid) · Plaquemines Parish (Hot-humid) · Pointe Coupee Parish (Hot-humid) · Rapides Parish (Hot-humid) · St. Bernard Parish (Hot-humid) · St. Charles Parish (Hot-humid) · St. Helena Parish (Hot-humid) · St. James Parish (Hot-humid) · St. John the Baptist Parish (Hot-humid) · St. Landry Parish (Hot-humid) · St. Martin Parish (Hot-humid) · St. Mary Parish (Hot-humid) · St. Tammany Parish (Hot-humid) · Tangipahoa Parish (Hot-humid) · Terrebonne Parish (Hot-humid) · Vermilion Parish (Hot-humid) · Washington Parish (Hot-humid) · West Baton Rouge Parish (Hot-humid) · West Feliciana Parish (Hot-humid)
Zone 3A: warm-humid
Attic target R49 (ENERGY STAR)Bienville Parish (Hot-humid) · Bossier Parish (Hot-humid) · Caddo Parish (Hot-humid) · Caldwell Parish (Hot-humid) · Catahoula Parish (Hot-humid) · Claiborne Parish (Hot-humid) · Concordia Parish (Hot-humid) · De Soto Parish (Hot-humid) · East Carroll Parish (Mixed-humid) · Franklin Parish (Hot-humid) · Grant Parish (Hot-humid) · Jackson Parish (Hot-humid) · LaSalle Parish (Hot-humid) · Lincoln Parish (Hot-humid) · Madison Parish (Hot-humid) · Morehouse Parish (Mixed-humid) · Natchitoches Parish (Hot-humid) · Ouachita Parish (Hot-humid) · Red River Parish (Hot-humid) · Richland Parish (Hot-humid) · Sabine Parish (Hot-humid) · Tensas Parish (Hot-humid) · Union Parish (Hot-humid) · Vernon Parish (Hot-humid) · Webster Parish (Hot-humid) · West Carroll Parish (Mixed-humid) · Winn Parish (Hot-humid)