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Some interesting and important Datasets
Central England Temperature (CET) series
Central England Temperature is representative of a roughly triangular area of the United Kingdom enclosed by Bristol, Lancashire and London. The monthly series begins in 1659, and is the longest available instrumental record of temperature in the world.
England & Wales Precipitation (EWP) series
The dataset of UK regional precipitation, which incorporates the long running England & Wales Precipitation (EWP) series beginning in 1766, the longest instrumental series of this kind in the world.