The highest temperature ever recorded on Earth was 136 Fahrenheit (58 Celsius) in the Libyan desert.The coldest temperature ever measured was -126 Fahrenheit (-88 Celsius) at Vostok Station in Antarctica.1  Javascript must be enabled to use Cool Cosmos. 2  Learn how.he highest temperature ever recorded on Earth was 136 Fahrenheit (58 Celsius) in the Libyan desert.