Global Analysis - September 2015
2015 year-to-date temperatures versus previous years

« Global Analysis - September 2015


2015 year-to-date temperatures versus previous years


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

The anomalies themselves represent departures from the 20th century average temperature. The graph zooms into the warmest part of the entire history. For a broader perspective on how these years relate to the long-term record, click here.

2015 year-to-date anomalies through August compared to five warmest years on record
Global Year to Date Temperature Anomalies