Which US states have warmed the most?

In the 10 years through 2025, Alaska was among the states that warmed most, averaging 3.3°F warmer than in 1901–2000, while Oklahoma was among those that warmed least, 1.6°F; the contiguous US warmed 2.2°F. Alaska's records start in 1925, so its baseline is 1925–2000. Hawaii's start in 1991, so it isn't included.

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Bars are sorted from highest to lowest and start at zero; each one's value is at its end. The dashed line is “Contiguous U.S.”, for comparison. On a phone it opens on the top and bottom 10; tap “Show all” for the rest.

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Key facts

Measure: °F warmer in the last 10 years than the 1901–2000 average. Written from the data below.

  • Alaska, New Jersey, and Rhode Island share the highest figure, 3.3.
  • Oklahoma and Arkansas share the lowest figure, 1.6.
  • Contiguous U.S.: 2.2. Of the 49 compared, 25 are above it, 23 below, and 1 the same.

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Source and date

Source
NOAA National Centers for Environmental Information, Climate at a Glance
License
Public domain (U.S. government work)
Data as of
Published

Citation

Chartly. “Which US states have warmed the most?” Chart. Data: NOAA National Centers for Environmental Information, Climate at a Glance, https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series (data as of December 31, 2025). https://chart.ly/charts/warming-by-state (accessed November 4, 2026).

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The data

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The file has the numbers in this table, with the source, license and date. Please credit the source and Chartly. Developers can also get them as JSON (how).

State °F warmer in the last 10 years than the 1901–2000 average
Alaska 3.3
New Jersey 3.3
Rhode Island 3.3
Connecticut 3.2
Massachusetts 3.2
Delaware 3.1
New Hampshire 3.1
Maine 3
Vermont 3
Maryland 2.8
Michigan 2.8
New Mexico 2.7
Arizona 2.6
Florida 2.6
New York 2.6
Ohio 2.6
Utah 2.6
California 2.5
Minnesota 2.5
Pennsylvania 2.5
Wisconsin 2.5
Colorado 2.4
Texas 2.4
Nevada 2.3
Virginia 2.3
Contiguous U.S. 2.2
West Virginia 2.2
Georgia 2.1
Indiana 2.1
North Carolina 2.1
North Dakota 2.1
Oregon 2.1
Wyoming 2.1
Illinois 2
Kentucky 2
South Carolina 2
Idaho 1.9
Louisiana 1.9
Mississippi 1.9
Missouri 1.9
Montana 1.9
Nebraska 1.9
Tennessee 1.9
Alabama 1.8
Iowa 1.8
South Dakota 1.8
Washington 1.8
Kansas 1.7
Arkansas 1.6
Oklahoma 1.6

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