Guardian: 2014 and 2015 each set the record for hottest calendar year since we began measuring surface temperatures over 150 years ago, and 2016 is almost certain to break the record once again. It will be without precedent: the first time that weve seen three consecutive record-breaking hot years.
But its just happenstance that the calendar year begins in January, and so its also informative to compare all yearlong periods. In doing so, it becomes clear that were living in astonishingly hot times....