Estimated U.S. average annual temperature in national parks 1991-2100
This statistic exhibits the average annual temperatures in the United States between 1991 and 2010 and also offers a forecast for 2100. During 1991 and 2010, the Saguaro National Park had an average temperature of 39 degrees Fahrenheit. The source predicts that this figure will reach 126 degrees Fahrenheit by 2100.