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).
Northeast (101)
- Connecticut (6)
- Delaware (7)
- Maine (17)
- Maryland (18)
- Massachusetts (19)
- New Hampshire (27)
- New Jersey (28)
- New York (30)
- Pennsylvania (36)
- Rhode Island (37)
- Vermont (43)
Upper Midwest (102)
- Iowa (13)
- Michigan (20)
- Minnesota (21)
- Wisconsin (47)
Ohio Valley (103)
- Illinois (11)
- Indiana (12)
- Kentucky (15)
- Missouri (23)
- Ohio (33)
- Tennessee (40)
- West Virginia (46)
Southeast (104)
- Alabama (1)
- Florida (8)
- Georgia (9)
- North Carolina (31)
- South Carolina (38)
- Virginia (44)
Northern Rockies and Plains (105)
- Montana (24)
- Nebraska (25)
- North Dakota (32)
- South Dakota (39)
- Wyoming (48)
South (106)
- Arkansas (3)
- Kansas (14)
- Louisiana (16)
- Mississippi (22)
- Oklahoma (34)
- Texas (41)
Southwest (107)
- Arizona (2)
- Colorado (5)
- New Mexico (29)
- Utah (42)
Northwest (108)
- Idaho (10)
- Oregon (35)
- Washington (45)
West (109)
- California (4)
- Nevada (26)
References
- 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.
