Global Climate Report - November 2017
2017 year-to-date temperatures versus previous years

« Global Climate Report - November 2017

2017 year-to-date temperatures versus previous years


2017 year-to-date anomalies through November compared to eight warmest years on record
Global Year to Date Temperature Anomalies

This graphic compares the year-to-date temperature anomalies for 2017 (black line) to what were ultimately the eight warmest years on record: 2016, 2015, 2014, 2010, 2013, 2005, 2009, and 1998. Each month along each trace represents the year-to-date average temperature anomaly. In other words, the January value is the January average temperature anomaly, the February value is the average anomaly of both January and February, and so on.

The average global land and ocean surface temperature for January–November 2017 was 0.84°C (1.51°F) above the 20th century average of 14.0°C (57.2°F)—the third highest global land and ocean temperature for January–November in the 1880–2017 record, behind the record year 2016 and 2015 (second highest).

The anomalies themselves represent departures from the 20th century average temperature. The graph zooms into the warmest part of the entire history.

2017 is gearing up to end among the top three warmest years on record and the warmest year with ENSO-neutral conditions. The graph includes several end-of-year results based on the following three scenarios:

  • If December 2017 matched the fifth highest temperature for December (represented by the black circle): 2017 would end up as the third warmest year on record at +0.83°C (1.49°F), behind 2016 (warmest) and 2015 (second warmest).
  • If December 2017 has a temperature departure of 0.85°C (1.53°F) (represented by the black square): 2017 would end up as the third warmest year (+0.84°C / +1.51°F) on record, behind 2016 (warmest) and 2015 (second warmest).
  • If December 2017 matched the 1998 monthly value (represented by the black triangle): 2017 would end up as the third warmest year (+0.82°C / +1.48°F) on record, behind 2016 (warmest) and 2015 (second warmest).