Brazilian scientists recorded 20.75C at Seymour Island on February 8, The Guardian reported.
The temperature in northern Antarctica hit almost 65 degrees (18.3 degrees Celsius), a likely heat record on the continent best known for snow, ice and penguins.
Schaefer said monitoring data from these areas could indicate what is in store for other parts of the region.
Last month was the hottest January on record, surpassing a previous high recorded in 2016, the U.S. climate service said on Thursday.
"We can't use this to anticipate future climate changes".
This record temperature came just about a week after the hottest day was recorded for Argentine Antarctica at 18.3 degrees Celsius at midday at the Esperanza base, which is situated near the Antarctic peninsula tip.
The previous record of 63.5 degrees (17.5 C) was set in March 2015.
"First we need to analyze the very important station metadata, for example, location, type of equipment, measurement practices, calibration of instruments, etc., of the researchers involved", he said.
What's happening: Per the NWS, the effects of the system will be "far-reaching" and impact travel in a vast area that's likely to affect millions of people.
According to them, February 9 for the first time in the entire history of observations, the temperature in Antarctica has risen to nearly 21 degrees, reports channel "Russia 24".
According to the World Meteorological Organization (WMO), amid steadily warming temperatures, the amount of ice lost annually from the Antarctic ice sheet increased at least six-fold between 1979 and 2017. It has been recording Antarctic temperatures since 1961.
Meanwhile, as the world grips with the fallout of global warming, scientists have made yet another alarming discovery - "warm" water under the Thwaites Glacier in Antarctica, according to worldwide reports.
It was pointed out that January 2020 is the 44th consecutive month above the average temperature, and the world is getting warmer.