September was hot — really hot.
The confusion stems from the fact that, while NASA and NOAA use the same exact raw temperature data, they each analyze it a little differently (you can read more about it here).
NOAA’s finding officially ends an unprecedented 16-month-long streak of record-breaking temperatures. There is now a greater than 99 percent chance that 2016 will end up being the hottest year we’ve ever seen. Ever.