The globe just had the hottest January-September on record, as well as the hottest September.
According to the Global Climate Report from the U.S. National Oceanic and Atmospheric Administration, the globally averaged air temperature over land and sea surface temperature for September was the greatest rise above average for any month in the 136-year historical record.
The September combined global average temperature of the air over land and ocean surface temperature was 1.62°F (0.90°C) above the 20th century average. Record warmth was observed across much of South America and parts of Africa, the Middle East, Europe, and Asia.
With strong El Niño conditions in place, the September globally averaged sea surface temperature was 0.81°C (1.46°F) above the 20th century average of 16.2°C (61.1°F), the highest departure for September on record, beating the previous record set last year by 0.07°C (0.13°F). This departure from average is also 0.25°C (0.45°F) higher than the global ocean temperature for September 1997, preceding the peaking up of the last strong El Niño of 1998.
The year-to-date globally averaged combined temperature of the air over land and ocean surface temperature was 1.53°F (0.85°C) above the 20th century average. This was the highest for January–September in the 1880–2015 record, surpassing the previous record set in 2014 by 0.19°F (0.12°C), according to NOAA.