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U.S. Climate Regions

Through climate analysis, National Climatic Data Center scientists have identified nine climatically consistent regions within the contiguous United States which are useful for putting current climate anomalies into a historical perspective (Karl and Koss, 1984).


U.S. Climate Regions
All Regions
Central
East North Central
Northeast
Northwest
South
Southeast
Southwest
West
West North Central
Central
Illinois (IL)
Indiana (IN)
Kentucky (KY)
Missouri (MO)
Ohio (OH)
Tennessee (TN)
West Virginia (WV)
East North Central
Iowa (IA)
Michigan (MI)
Minnesota (MN)
Wisconsin (WI)
Northeast
Connecticut (CT)
Delaware (DE)
Maine (ME)
Maryland (MD)
Massachusetts (MA)
New Hampshire (NH)
New Jersey (NJ)
New York (NY)
Pennsylvania (PA)
Rhode Island (RI)
Vermont (VT)
Northwest
Idaho (ID)
Oregon (OR)
Washington (WA)
South
Arkansas (AR)
Kansas (KS)
Louisiana (LA)
Mississippi (MS)
Oklahoma (OK)
Texas (TX)
Southeast
Alabama (AL)
Florida (FL)
Georgia (GA)
North Carolina (NC)
South Carolina (SC)
Virginia (VA)
Southwest
Arizona (AZ)
Colorado (CO)
New Mexico (NM)
Utah (UT)
West
California (CA)
Nevada (NV)
West North Central
Montana (MT)
Nebraska (NE)
North Dakota (ND)
South Dakota (SD)
Wyoming (WY)

Reference

  • Thomas R. Karl and Walter James Koss, 1984: "Regional and National Monthly, Seasonal, and Annual Temperature Weighted by Area, 1895-1983." Historical Climatology Series 4-3, National Climatic Data Center, Asheville, NC, 38 pp.