Trivia question(9/2012): What is the "world's hottest"temperature ever recorded? The answer until recently has been El Azizia, Libya, where a temperature of 136.4F(58C) was recorded on September 13, 1922 . This week, the World Meteorological Organization says a change in the record books is needed as the temperature recording at El Azizia is no longer accurate. The new "world's hottest" temperature ever record goes to Death Valley, California.Back on July 10,1913, a temperature of 134(56.7C) was recorded.