Method: Met Office published area-average total precipitation, from the HadUK-Grid 1 km gridded analysis of the national rain gauge network. Gauge density is far lower in the nineteenth century than today, and mountain precipitation is systematically under-measured, so early values carry greater uncertainty than recent ones.
Retrieved 1 October 2026.
Rainfall
Annual rainfall — South West England and South Wales (climate district)
Shading marks when something was recorded, not what caused the line.
What the shaded periods are (1 event)
A shaded period marks when something was recorded, not what caused the shape of the line. Where the two coincide, they coincided.
Documented record — A documented event, compiled from cited sources after it happened. The dates are as good as the record, which for older events can mean the month rather than the day.
The 1976 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
The 2022 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Yorkshire drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Cantareira water crisis, São Paulo — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Cape Town Day Zero — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Hurricane Katrina water and sanitation collapse — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
View the data behind this chart
Underlying data
Period
South West England and South Wales (climate district) (mm)
No bulk download is offered here, which is a licence position rather than a product one: at least one contributing publisher does not permit redistribution. The values can be read on the page, cited, and pointed to at source.
Attribution and citation
Attribution you are required to give
These are conditions of the licences the underlying data is published under. They are obligations to the publishers, not to Hydrionis, and they apply to you directly whether or not you mention Hydrionis at all.
Contains public sector information licensed under the Open Government Licence v3.0.
Hydrionis (2026), Water data for South West England and South Wales (climate district), accessed 2026-10-05, hydrionis.com/regions/south-west-england-and-south-wales-climate-district/
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Recommended, not required. Hydrionis does not claim rights over unmodified public data it relayed, and doing arithmetic on somebody else’s measurements does not make them Hydrionis’s. Cite the version and the access date: the South West England and South Wales (climate district) record changes as publishers release and as methods are revised, and a citation without both cannot be checked later. Full guidance is on cite and reuse.
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