Key West, Florida and Mount Washington, New Hampshire have the highest and lowest average temperatures respectively in the US, excluding Alaska and Hawaii. Florida has the warmest average temperatures. The highest and lowest recorded temperatures on Earth are 134°F (56.7°C) in Death Valley, California in 1913 and -128.6°F (-89.2°C) in Antarctica in 1983 respectively. The average global temperature has increased by 1.4°F (0.8°C) since 1880.
U.S. locations that have the highest and lowest average temperatures, not counting locations in Alaska or Hawaii, are Key West, Florida, and Mount Washington, New Hampshire, based on long-term data from major observation stations of the National Oceanic and Atmospheric Association. Key West has an average temperature of 78.1° Fahrenheit (25.6° Celsius) and Mount Washington has an average temperature of 27.2° Fahrenheit (32.8° Celsius). Florida is generally the state with the warmest average temperatures, with seven of the 10 hottest U.S. locations originating from the state.
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The attempt to measure temperature is thought to date back to the Ancient Greeks in AD 170, and versions of thermometers were invented around 1593.
The highest recorded temperature on Earth was 134° Fahrenheit (56.7° Celsius) in Death Valley, California in 1913. The coldest was -128.6° Fahrenheit (-89.2° Celsius) in Antarctica in 1983.
The average global temperature is estimated to have increased by 1.4° Fahrenheit (0.8° Celsius) since 1880.
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