Minnesota climate zones
Minnesota’s 87 counties fall in 3 IECC 2021 climate zones: 5A (3), 6A (61), 7 (23).
Zone 5A: cool-humid
Attic target R60 (ENERGY STAR)Fillmore County (Cold) · Houston County (Cold) · Winona County (Cold)
Zone 6A: cold-humid
Attic target R60 (ENERGY STAR)Anoka County (Cold) · Becker County (Cold) · Benton County (Cold) · Big Stone County (Cold) · Blue Earth County (Cold) · Brown County (Cold) · Carver County (Cold) · Chippewa County (Cold) · Chisago County (Cold) · Clay County (Cold) · Cottonwood County (Cold) · Dakota County (Cold) · Dodge County (Cold) · Douglas County (Cold) · Faribault County (Cold) · Freeborn County (Cold) · Goodhue County (Cold) · Grant County (Cold) · Hennepin County (Cold) · Isanti County (Cold) · Jackson County (Cold) · Kanabec County (Cold) · Kandiyohi County (Cold) · Lac qui Parle County (Cold) · Le Sueur County (Cold) · Lincoln County (Cold) · Lyon County (Cold) · Martin County (Cold) · McLeod County (Cold) · Meeker County (Cold) · Mille Lacs County (Cold) · Morrison County (Cold) · Mower County (Cold) · Murray County (Cold) · Nicollet County (Cold) · Nobles County (Cold) · Olmsted County (Cold) · Otter Tail County (Cold) · Pipestone County (Cold) · Pope County (Cold) · Ramsey County (Cold) · Redwood County (Cold) · Renville County (Cold) · Rice County (Cold) · Rock County (Cold) · Scott County (Cold) · Sherburne County (Cold) · Sibley County (Cold) · Stearns County (Cold) · Steele County (Cold) · Stevens County (Cold) · Swift County (Cold) · Todd County (Cold) · Traverse County (Cold) · Wabasha County (Cold) · Waseca County (Cold) · Washington County (Cold) · Watonwan County (Cold) · Wilkin County (Cold) · Wright County (Cold) · Yellow Medicine County (Cold)
Zone 7: very cold
Attic target R60 (ENERGY STAR)Aitkin County (Very cold) · Beltrami County (Very cold) · Carlton County (Very cold) · Cass County (Very cold) · Clearwater County (Very cold) · Cook County (Very cold) · Crow Wing County (Very cold) · Hubbard County (Very cold) · Itasca County (Very cold) · Kittson County (Very cold) · Koochiching County (Very cold) · Lake County (Very cold) · Lake of the Woods County (Very cold) · Mahnomen County (Very cold) · Marshall County (Very cold) · Norman County (Very cold) · Pennington County (Very cold) · Pine County (Very cold) · Polk County (Very cold) · Red Lake County (Very cold) · Roseau County (Very cold) · St. Louis County (Very cold) · Wadena County (Very cold)