Of course, this record is impossible to ascertain without doubt, but a likely contender for the hottest day in history is 10 July 1913 at aptly named Furnace Creek, California. At 134 degrees fahrenheit (57 degrees celsius). Death Valley had been experiencing an extreme heat wave with temperatures of 125 degrees fahrenheit (51.6 degrees Celsius) for the whole week. Strangely, Death Valley also entered into the record books on 8 January earlier that year for its lowest ever recorded temperature at 5 degrees fahrenheit (-15 degrees celsius). For 90 years Death Valley lost its high temperature record to El Aziza Libya which reported temperatures of 136.4 degrees fahrenheit (58 degrees celsius), but this was later discredited and Furnace Creek reclaimed its fiery crown.