1978-2013 Temperature TrendMeryll:dreamstimeEvery month University of Alabama in Huntsville climatologists John Christy and Roy Spencer report the latest global temperature trends from satellite data. Below are the newest data updated through September 2013:

Global Temperature Report: September 2013

Global climate trend since Nov. 16, 1978: +0.14 C per decade

September temperatures (preliminary)

Global composite temp.: +0.37 C (about 0.67 degrees Fahrenheit) above 30-year average for September.

Northern Hemisphere: +0.34 C (about 0.61 degrees Fahrenheit) above 30-year average for September.

Southern Hemisphere: +0.39 C (about 0.70 degrees Fahrenheit) above 30-year average for September.

Tropics: +0.19 C (about 0.34 degrees Fahrenheit) above 30-year average for September.


(All temperature anomalies are based on a 30-year average (1981-2010) for the month reported.)

Go here to download monthly global temperature data since 1978.