For many Mainers, ice-skating and snowmobiling weren’t part of last December’s holiday break. There was open water on lakes and green grass throughout much of the state as daytime high temperatures reached into the 50s. In fact, December 2015 through February 2016 — the meteorological winter — was the warmest or near warmest read more 2015 warmest year, on average, across Northern Hemisphere – S. Birkel