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UKCP09: Daily data sets

Daily temperature data sets

Climate variable Definition First year available Last year available
Daily maximum temperature Highest air temperature from 0900-0900 (°C) (starting at 0900 on the day in question) 1960 2011
Daily minimum temperature Lowest air temperature from 0900-0900 (°C) (ending at 0900 on the day in question) 1960 2011
Daily mean temperature Average of daily maximum and daily minimum temperatures (°C) 1960 2011

The daily data sets are available in two formats.

  • A grid for each day covering the whole of the UK, downloadable in 1-year blocks, as space-delimited text files
  • Time series of daily values by grid point, downloadable in blocks covering 50 km x 50 km squares, as comma-delimited text files

Daily precipitation data sets

Daily precipitation data sets have also been generated but are not available for download; enquiries about purchasing these should be directed to the Customer Centre. Instead, various derived quantities are available. These have been calculated for each grid cell, by year and by season, as follows.
Climate variable/definition First year available Last year available
Precipitation total (mm) 1960 2011
Amount (mm) and date of the greatest single-day precipitation 1960 2011
Amount (mm) and date of the greatest two-day precipitation 1960 2011
Amount (mm) and date of the greatest ten-day precipitation 1960 2011
1961-1990 90th percentile for single-day precipitation amount N/A N/A
1961-1990 99th percentile for single-day precipitation amount N/A N/A
Number of single-day rainfall events that exceed the 1961-1990 90th percentile 1960 2011
Number of single-day rainfall events that exceed the 1961-1990 99th percentile 1960 2011
Proportion (%) of precipitation total from events that exceed the 1961-1990 90th percentile 1960 2011
Proportion (%) of precipitation total from events that exceed the 1961-1990 99th percentile 1960 2011
Maximum number of consecutive wet days (>=10 mm) 1960 2011
Maximum number of consecutive dry days (<=0.2 mm) 1960 2011

Related internet links

Department for Environment, Food and Rural Affairs (Defra)

UK Climate Impacts Programme (UKCIP)

The Met Office is not responsible for the content of external internet sites.

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In order to download the UKCP09 Gridded Observation Data Sets, you will need to register.


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