The Southwestern US, Mid Atlantic and Alaska are among the fastest warming places in the country in the last 50 years. Some places in New Mexico and Alaska have seen a yearly temperature jump of 4 degrees Fahrenheit since the 1970s. Summer temperatures in the Southwest and winter/autumn temperatures in Alaska have the strongest warming in US. Worsening drought conditions in the southwestern US and rapid sea ice lost around Alaska are the causes of rapid temperatures increases over the last few decades.
Here is the 50-year temperature trend by Alaska's climatologist Brian Brettschneider, in spring across in US. The most noticeable warming places in the last 50 years are northern and western Alaska, Arizona, New Mexico, southwest Colorado and parts of Utah, Nevada and California. The north central US had spring temperature cooled by 1 degree Fahrenheit in the last 50 years.
10 Fastest warming States (average yearly temperature difference) 1991-2020 against 1981-2010:
Alaska: +0.92°F
New Mexico +0.8°F
Delaware +0.79°F
New Jersey +0.71°F
Rhode Island +0.68°F
Massachusetts +0.67°F
Texas +0.65°F
Arizona +0.6°F
California +0.59°F
North Carolina +0.58°F
Thirteen noticeable fast warming places in the United States (1.5°F+ average yearly temperature difference) 1991-2020 against 1981-2010: *Note: there are some places in Alaska, California, New Mexico, Texas and Vermont that warmed more than 1.5°F in the last 30 years.
Del Rio, Texas +3.45°F
Nenana, Alaska +3.4°F
Mount Mansfield, Vermont +3.4°F
Utqiagvik (Barrow), Alaska +2.5°F
Roswell, New Mexico +2.35°F
Kotzebue, Alaska +2.45°F
Death Valley, California +1.65°F
Needles, California +1.95°F
Deadhorse, Alaska +2.4°F
Brownsville, Texas +1.75°F
McAllen, Texas +1.8°F
El Paso, Texas +1.7°F
Carlsbad, New Mexico +2.0°F
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