Last month was the hottest September ever recorded, beating 2014's previous record by 0.004°C.
According to new NASA data, temperatures were 1.6°F (0.91°C) above the 1951-1980 average.
Monthly temperatures (departure from 1980–2015), superimposed on the 1980–2015 mean seasonal cycle.NASA / GISS / Schmidt
According to an official statement from NASA's Goddard Institute for Space Studies, "September 2016 was the warmest September in 136 years of modern record-keeping, according to a monthly analysis of global temperatures by scientists at NASA's Goddard Institute for Space Studies in New York."
NASA's Gavin Schmidt said it "seems locked in" that 2016 will be the hottest year ever with temperatures approximately 1.25°C above the late 19th century average.
With data now available through September, 2016 annual record (~1.25ºC above late 19th C) seems locked in. https://t.co/Btp3Vutakn— Gavin Schmidt (@Gavin Schmidt)1476718563.0
For a deeper dive: