The highest temperature recorded on Earth has been measured in three major ways: air, ground, and via satellite observation. The former of the three is used as the standard measurement due to persistent issues with unreliable ground and satellite readings. Air measurements are noted by the World Meteorological Organization (WMO) and Guinness World Records among others as the standard to be used for determining the official record. The current official highest registered air temperature on Earth is 56.7 °C (134.1 °F), recorded on 10 July 1913 at Furnace Creek Ranch, in Death Valley in the United States. For ninety years, a former record that was measured in Libya had been in place, until it was decertified in 2012 based on evidence that it was an erroneous reading. This finding has since raised questions about the legitimacy of the 1913 record measured in Death Valley, with several meteorological experts asserting that there were similar irregularities. The WMO has stood by the record as official pending any future investigative results. If the current record were to be decertified then the holder would be a tie at 54.0 °C (129.2 °F), recorded both at Furnace Creek, and in Kuwait.

Several unverified temperatures of all three readings have also been recorded that exceed the current record holder. These include historical claims that were never authenticated due to the equipment available at the time and unverified scientific claims. There are also disproven amateur readings that have been posted on social media showing evidence of extreme temperature.

 

Note:   The above text is excerpted from the Wikipedia article Highest temperature recorded on Earth, which has been released under the GNU Free Documentation License.