Dataset: Total Monthly Rainfall at Rothamsted March 1853 - December 2022

Example data: Total January Rainfall at Rothamsted each year 1853-2022

Example data: Total January Rainfall at Rothamsted each year 1853-2022


This dataset represents the total monthly rainfall at Rothamsted continuously from March 1853 - December 2022 and is derived from continuous daily records measured at the site.


Daily rainfall is measured as the total (mm) over the 24-hour period 0900 to 0900 GMT. It includes all precipitation - snow, rain, mist and fog. Rainfall was first recorded at Rothamsted in 1853, using a copper funnel rain gauge (5 inch / 12.7 cm diameter) and measured using a graduated cylinder. Since 2004 it has been measured using an electronic tipping bucket rain gauge (10 inch / 25.4cm diameter), ARG100, calibrated to tip at 0.2mm (which has since become the minimum amount of rain that can be recorded). The rain gauge is placed within a 30cm deep 1.5m radius turf wall, retained by brick, to reduce wind eddies that may potentially blow rain out of the gauges. Data were collected daily manually until 2004 and since then by Automatic Weather Station using a standard protocol.

Technical Information

Location: Rothamsted Meteorological Station, Harpenden, Hertfordshire, England 51.82 N 0.37 W 128 m asl.

On 09/09/2020 we upgraded the rain gauge from the ARG100 tipping bucket rain gauge within Turf Wall to a SBS500 tipping bucket rain gauge (Manufactured by Environmental Measurements Limited (EML), supplied by Campbell Scientific Ltd) which was positioned outside of turf wall enclosure.

Related Documents


  • Sarah Perryman: Data curator
  • Tony Scott: Data collector
  • Chris Hall: Data collector
  • Andy Gregory: Project manager
  • Nathalie Castells-Brooke: Data manager
  • Margaret Glendining: Data curator
  • Richard Ostler: Project leader

Dataset Access and Conditions

Rights Holder

Rothamsted Research


Creative Commons License This dataset is available under a Creative Commons Attribution Licence (4.0).

Cite this Dataset

YOU MUST CITE AS: Sarah Perryman, Tony Scott, Chris Hall (0). Dataset: Total Monthly Rainfall at Rothamsted March 1853 - December 2022 Electronic Rothamsted Archive, Rothamsted Research

Please review our How to Credit Datasets guidance for more information.

Conditions of Use

Rothamsted relies on the integrity of users to ensure that datasets are used appropriately and Rothamsted Research receives suitable acknowledgment as being the originators of these data. Please review the Conditions of Use before downloading.

The monthly summary data contained in this spreadsheet are derived from daily data measured at Rothamsted Meteorological Station, Harpenden.

Verification includes checks for instrument errors, for missing data and outliers.

The original daily data is available, after registering, from the e-RA database. Please register here . Contact the e-RA Curators for further details

For further information and assistance, please contact the e-RA curators, Sarah Perryman and Margaret Glendining using the e-RA email address: