The northern hemisphere winter , December 2015 to February 2016, was the warmest in the records.
The average temperature, taken for northern land and ocean surfaces, was
1.13°C above the 20 century average.
This was the highest for December, January and February in the 1880–2016 record, passing the previous record of 2007 by 0.29°C.
December 2015–February 2016 also marks the highest 3-month departure from average for any 3-month period on record.
It is interesting to note that there were some 'cold spots'.
There is an obvious 'blue blob' in the North Atlantic.
Some scientists have linked this to melt-water from Greenland.
“It is conspicuous that one specific area in the North Atlantic has been cooling in the past hundred years while the rest of the world heats up,” says Stefan Rahmstorf of the Potsdam Institute for Climate Impact Research.