North Dakota climate zones
North Dakota’s 53 counties fall in 2 IECC 2021 climate zones: 6A (37), 7 (16).
Zone 6A: cold-humid
Attic target R60 (ENERGY STAR)Adams County (Cold) · Barnes County (Cold) · Billings County (Cold) · Bowman County (Cold) · Burleigh County (Cold) · Cass County (Cold) · Dickey County (Cold) · Dunn County (Cold) · Eddy County (Cold) · Emmons County (Cold) · Foster County (Cold) · Golden Valley County (Cold) · Grant County (Cold) · Griggs County (Cold) · Hettinger County (Cold) · Kidder County (Cold) · LaMoure County (Cold) · Logan County (Cold) · McIntosh County (Cold) · McKenzie County (Cold) · McLean County (Cold) · Mercer County (Cold) · Morton County (Cold) · Mountrail County (Cold) · Oliver County (Cold) · Ransom County (Cold) · Richland County (Cold) · Sargent County (Cold) · Sheridan County (Cold) · Sioux County (Cold) · Slope County (Cold) · Stark County (Cold) · Steele County (Cold) · Stutsman County (Cold) · Traill County (Cold) · Wells County (Cold) · Williams County (Cold)
Zone 7: very cold
Attic target R60 (ENERGY STAR)Benson County (Very cold) · Bottineau County (Very cold) · Burke County (Very cold) · Cavalier County (Very cold) · Divide County (Very cold) · Grand Forks County (Very cold) · McHenry County (Very cold) · Nelson County (Very cold) · Pembina County (Very cold) · Pierce County (Very cold) · Ramsey County (Very cold) · Renville County (Very cold) · Rolette County (Very cold) · Towner County (Very cold) · Walsh County (Very cold) · Ward County (Very cold)