The dataset contains monthly average surface temperature values from over 5,000
weather stations across the world.
The data comes from HadCRUT3, a gridded dataset of global historical surface
temperature anomalies produced by the Met Office Hadley Centre and the Climatic
Research Unit at the University of East Anglia. It is one of the global
temperature records that has underpinned Intergovernmental Panel on Climate
Change (IPCC) assessment reports and numerous scientific studies.
The data subset consists of a network of individual land stations that has been
designated by the World Meteorological Organization (WMO) for use in climate
monitoring and other data that the Met Office has gained permission from the
owners to make available.