Unclear on the concept: When the Central Park high temperature yesterday fell 12 degrees short of the 1998 record for that date, warmist Piers Morgan holds that up as evidence that CO2 is overheating the planet

Global Warming Skeptic Marc Morano Debates Bill Nye the Science Guy on Climate Change | NewsBusters.org

PIERS MORGAN, HOST: Our big story tonight, you are so hot, America. And I mean that literally. The temperature was a balmy 60 degrees this afternoon in New York just outside CNN's studios. The average high temperature in December is normally 43.

Central Park weather history for December 4 : Weather Underground

Max Temperature [2012] 62 °F  Record 74 °F (1998)