September 2016 is the warmest September on record: NASA
September 2016 is the warmest September in the 136 years of modern record-keeping, according to a monthly analysis of global temperatures by NASA. The mean temperature of the month this year was 0.004ºC more than 2014 September, the previous warmest, and 0.91ºC more than the mean of September temperatures from 1951 to 1980.