The United States Has Not Warmed Since 1991

With the release of the latest National Climate Assessment, media outlets are filled with incorrect information.

At Vox.com, Blad Plumer gives us "nine maps that show how climate change is already affecting the US" and then claims next to his very first map that "since 1991, every region in the United States has been warming, with the biggest temperature increases occurring in the winter and spring."

Wrong.

Here are annual temperatures in all U.S. climate regions since 1991, along with annual temperatures for the contiguous U.S. as a whole.

On the contrary, there has been no significant change in annual temperatures since 1991 in any U.S. climate region with the sole exception of the northeast division, for which there has been an increasing trend since 1991 (but no trend since 1998).

There has been no significant change in annual temperatures for the contiguous United States since 1991. None.

With the release of the latest National Climate Assessment, media outlets are filled with incorrect information.

At Vox.com, Blad Plumer gives us "nine maps that show how climate change is already affecting the US" and then claims next to his very first map that "since 1991, every region in the United States has been warming, with the biggest temperature increases occurring in the winter and spring."

Wrong.

Here are annual temperatures in all U.S. climate regions since 1991, along with annual temperatures for the contiguous U.S. as a whole.

On the contrary, there has been no significant change in annual temperatures since 1991 in any U.S. climate region with the sole exception of the northeast division, for which there has been an increasing trend since 1991 (but no trend since 1998).

There has been no significant change in annual temperatures for the contiguous United States since 1991. None.

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