This dataset contains a set of reference long term averages for observed climate variables on an approximately 25km resolution grid. This matches the resolution of the HadRM3 regional climate model and the UKCP09 climate projections. These data represent the baseline reference climate averages for the period 1961 – 1990. The data were derived from the Met Office gridded land surface climate observations – long term averages at 5km resolution (see related dataset). Each 25 x 25km grid box value is an average of the 5 x 5 km grid cell values that fall within it. Averages have been calculated for each month, season and the year as a whole (17 data sets). For the days of frost and days of rain variables the seasonal and annual averages are the total of the individual monthly averages. For the remaining variables the seasonal and annual averages are the mean of the monthly averages (allowing for differences in month length). To facilitate combining the baseline data with the UKCP09 climate projections, the 25 km baseline averages for rainfall have been expressed in units of millimetres per day (rather than total millimetres, as for the 5 km data sets). The data are provide in CF-1.5 compliant NetCDF format. The data are additionally provided in ESRI-ascii format, suitable for ingestion in GIS applications, and a simple timeseries format for users requiring a limited number of points.

This dataset contains a set of observed climate indices on a 5km resolution grid. The data are derived from daily temperature and precipitation grids (see related dataset) to provide annual indicies: 9 temperature based indices (for example summer heatwave duration); and 12 precipitation indices (for example maximum 1 day precipitation amount). The data are provide in CF-1.5 compliant NetCDF format. The data are additionally provided in ESRI-ascii format, suitable for ingestion in GIS applications, and a simple timeseries format for users requiring a limited number of points.

This dataset contains a set of reference long term averages for observed climate variables that have been spatially averaged over a set of 14 administrative regions and 23 river basins across the British Isles (see links to maps and lists below). Where possible, reference climatologies for each of the periods 1961-1990, 1971-2000 and 1981-2010 are available for each variable. The availability of a variable for a given reference period was dependant on sufficient data for that variable within the reference period. Each regional value is an average of the 5km x 5km grid cell values that fall within it. The data were derived from the Met Office gridded land surface climate observations – long term averages at 5km resolution (See related dataset) and are provided as space delimited text files. The 14 administrative regions used within UKCP09 were: - East Midlands - East of England - East Scotland - London - North East England - North Scotland - North West England - Northern Ireland - South East England - South West England - Wales - West Midlands - West Scotland - Yorkshire & The Humber The 23 river basin regions used within UKCP09 were: - Anglian - Argyll - Clyde - Dee - Forth - Humber - Neagh Bann - North East Scotland - North Eastern Ireland - North Highland - North West England - North Western Ireland - Northumbria - Orkney and Shetland - Severn - Solway - South East England - South West England - Tay - Thames - Tweed - West Highland - Western Wales

This dataset contains a set of reference long term averages for observed climate variables on a 5km resolution grid. Where possible, reference climatologies are available for the periods 1961-1990, 1971-2000 and 1981-2010 for each variable. The availability of the variable for the given reference period was dependant on sufficient data being available for the variable for that period. The data were derived from the Met Office gridded land surface climate observations - monthly variables at 5km resolution (see related dataset). The averages are calculated by averaging the 30 monthly or annual gridded datasets for each variable for each averaging period. The data are provide in CF-1.5 compliant NetCDF format. The data are additionally provided in ESRI-ascii format, suitable for ingestion in GIS applications.

This collection contains datasets of climate variables derived from the network of UK land surface observations. The data have been interpolated from meteorological station data onto a uniform grid to provide complete and consistent coverage across the UK. The data sets cover the UK at 5 x 5 km resolution and span the period 1910 - 2015. They are available at daily, monthly and annual timescales, as well as long-term averages for the periods 1961 - 1990, 1971 - 2000, and 1981 - 2010. Baseline averages are also available at 25 x 25 km resolution to match the UKCP09 climate change projections. The primary purpose of this data resource is to encourage and facilitate research into climate change impacts and adaptation. The datasets have been created by the Met Office with financial support from the Department for Environment, Food and Rural Affairs (Defra) and are promoted within the UK Climate Projections (UKCP09). The UKCP09 report The climate of the UK and recent trends uses these gridded data sets to describe UK climatoloagies and regional trends.