HadUKP - UK regional precipitation series
HadUKP is a 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.
The map (below) shows the regions that are available, with the
monthly series for England and Wales sub-regions going back to 1873. Daily series for all
sub-regions, and the monthly series for Scotland and Northern Ireland, begin in 1931.
Brief description of the data
HadUKP incorporates a selection of long-running rainfall stations to provide a homogeneity adjusted
series of areally averaged precipitation. The England and Wales (HadEWP) precipitation totals are
based on daily weighted totals from a network of stations within each of five England and Wales regions.
A full quality control is performed on the 5th of each subsequent month, allowing monthly totals to be updated.

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Other information
- View HadUKP diagnostics
- HadUKP is produced using an operational system which relies on a number of components.
Daily support is not available for this system, therefore the data may experience delays.
If you experience any problems or want to request a more reliable service please
contact us.
- Please note that an alternative
England and Wales Rainfall series is produced at the Met Office by the National Climate
Information Centre. It is calculated from a gridded dataset produced using all available
stations back to 1914, but it is not available for daily timescales and is not adjusted for temporal
homogeneity. HadUKP is based upon a smaller network of representative stations and is adjusted for temporal
homogeneity as well as being available on daily timescales back to 1931.
- We are currently running a project to merge the HadUKP series with the England and Wales Rainfall series described above. The outcome of
this project will be a single historical rainfall series for the UK. If you would like further information about the proposed merged
precipitation series, please contact climat@metoffice.gov.uk.
Dataset produced in collaboration with: