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Global monthly average surface air temperature since 1979 according to the Goddard Institute for Space Studies (GISS), at Columbia University, New York City, USA. GISS is a laboratory of the Earth-Sun Exploration Division of NASA's Goddard Space Flight Center and a unit of the Columbia University Earth Institute. T
he thick line is the simple running 37 month average, nearly corresponding to a running 3 yr average.
Discussions of reasons why the GISS temperature estimate differs from other estimates can be read by clicking here, here and here. Base period: 1951-1980. Last month shown: March 2024. Last diagram update: 15 April 2024.
Source:The climate4you.com website is developed by Professor Ole Humlum who is a Danish Professor Emeritus of Physical Geography at the University of Oslo, and Adjunct Professor of Physical Geography at the University Centre in Svalbard.
The website climate4you.com (from which the above graph is from) endeavours to provide an ongoing climate data website which is updated monthly.