The Rainfall API currently provides access to data for the last month.
Historic rainfall data for the past 12 months is available to download from our archive in csv format: http://environment.data.gov.uk/flood-monitoring/archive
To download the data as a csv, simply highlight the top row and select the filter button:
You can filter the results to the station or area of interest.
Please note this is unvalidated data and could potentially contain errors due to faulty instruments or on-site maintenance.
If you need a full historic supply of a single site, or for data more than a year old, you would need to make a request for an offline supply via firstname.lastname@example.org