Global Temperature Report: May 2010

First five months of 2010 second warmest on record
Global climate trend since Nov. 16, 1978: +0.14 C per decade
May temperatures (preliminary)
Global composite temp.: +0.53 C (about 0.95 degrees Fahrenheit) above
20-year average for May.
Northern Hemisphere: +0.78 C (about 1.40 degrees Fahrenheit) above 20-year
average for May.
Southern Hemisphere: +0.29 C (about 0.52 degrees Fahrenheit) above 20-year
average for April.
Tropics: +0.71 C (about 1.28 degrees Fahrenheit) above 20-year average for
May.
April temperatures (revised):
Global Composite: +0.50 C above 20-year average
Northern Hemisphere: +0.80 C above 20-year average
Southern Hemisphere: +0.20 C above 20-year average
Tropics: +63 C above 20-year average
(All temperature anomalies are based on a 20-year average (1979-1998) for
the month reported.)
Notes on data released June 7, 2010:
In the race to …

Second warmest April on record is warmest month in the Arctic
Global climate trend since Nov. 16, 1978: +0.14 C per decade
April temperatures (preliminary)
Global composite temp.: +0.50 C (about 0.9 degrees Fahrenheit) above 20-year average for April.
Northern Hemisphere: +0.80 C (about 1.44 degrees Fahrenheit) above 20-year average for April.
Southern Hemisphere: +0.21 C (about 0.38 degrees Fahrenheit) above 20-year average for April.
Tropics: +0.63 C (about 1.34 degrees Fahrenheit) above 20-year average for April.
March temperatures (revised):
Global Composite: +0.66 C above 20-year average
Northern Hemisphere: +0.85 C above 20-year average
Southern Hemisphere: +0.46 C above 20-year average
Tropics: +73 C above 20-year average
(All temperature anomalies are based on a 20-year average (1979-1998) for the month reported.)
Notes on data released May 6, 2010:
The …

Global climate trend since Nov. 16, 1978: +0.13 C per decade
August temperatures (preliminary)
Global composite temp.: +0.23 C (about 0.41 degrees Fahrenheit) above 20-year average for August.
Northern Hemisphere: +0.28 C (about 0.50 degrees Fahrenheit) above 20-year average for August.
Southern Hemisphere: +0.18 C (about 0.32 degrees Fahrenheit) above 20-year average for August.
July temperatures (revised):
Global Composite: +0.41 C above 20-year average
Northern Hemisphere: +0.21 C above 20-year average
Southern Hemisphere: +0.61 C above 20-year average
(All temperature variations are based on a 20-year average (1979-1998) for the month reported.)
Notes on data released September 8, 2009:
The tropics continued to respond in August to warming caused by the El Niño Pacific Ocean warming event, with the average temperature in the tropics warming from …