The coldest-ever temperature recorded on Antarctica hit -89.2C (-128.6F) on July 21, 1983, at the Russian Vostok Station in Princess Elizabeth Land.
Recent temperatures came close, however, according to journalist Maximiliano Herrera.
Mr Herrera runs the Twitter account Extreme Temperatures Around The World where he monitors the hottest and coldest temperatures on the planet.
On October 1 he tweeted: “Exceptional cold in the Antarctic Plateau.
“The Russian Base of Vostok on 30 September dropped to a minimum temperature of -79.4C, which is only 0.6C above the world lowest temperature ever recorded in October (recorded at the former Plateau Station, also in Antarctica).”