U.S. Climate Regions

Through climate analysis, National Centers for Environmental Information 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.