claim: It has occurred during the warmest year on record, which occurred in 2015, and the two most unusually mild months on Earth, which took place in January and February, respectively.”
evidence: Every winter month ( December, January, February ) had a CET above 5 °C ( 41 °F ), only the second time this has happened since 1900 ( after 1988 / 89, although November 1988 was colder than any month of 2006 / 07 ) and only the sixth since 1659 ( 1685–86, 1833–34, 1833–34, and 1868 / 69 also ).