Every 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 April 2013:
Global climate trend since Nov. 16, 1978: +0.14 C per decade
April temperatures (preliminary)
Global composite temp.: +0.10 C (about 0.18 degrees Fahrenheit) above 30-year average for April.
Northern Hemisphere: +0.12 C (about 0.22 degrees Fahrenheit) above 30-year average for April.
Southern Hemisphere: +0.09 C (about 0.16 degrees Fahrenheit) above 30-year average for April.
Tropics: +0.17 C (about 0.31 degrees Fahrenheit) above 30-year average for April.
Go here to see the monthly satellite data from 1978 to the present.
