Washington - Even in a record-breaking hot year for Earth, October stood out as absurdly warm.
The US National Oceanic and Atmospheric Administration said that last month globally was 14.98°C. That's the hottest October on record by a third of a degree over the old mark, a large margin for weather records.
October's temperature was the most above-normal month in history. It was 0.98°C above the 20th-century average.
This was the eighth month this year when a heat record was set. That's a record number of broken records in any year. Records go back to 1880.
NOAA climate scientist Jessica Blunden said 2015 will be the hottest year on record. She blamed a potent El Nino on top of accelerating man-made global warming.