Monthly gridded data sets at 5 x 5 km resolution are available for 16 variables. The list of available variables is given below, together with a definition for each variable.
|Climate variable||Definition||First year available||Last year available|
|Mean daily maximum temperature||Average of the daily highest air temperatures from 0900-0900 (°C)||1910||2011|
|Mean daily minimum temperature||Average of the daily lowest air temperatures from 0900-0900 (°C)||1910||2011|
|Mean air temperature||Average of mean daily maximum and mean daily minimum temperatures (°C)||1910||2011|
|Days of air frost||Count of days when the air minimum temperature is below 0 °C||1961||2011|
|Days of ground frost||Count of days when the grass minimum temperature is below 0 °C||1961||2011|
|Sunshine duration||Duration of bright sunshine during the month (hours per day)||1929||2011|
|Total precipitation||Total precipitation amount (mm) during the month||1910||2011|
|Days of rain ≥1 mm||Number of days with ≥1 mm precipitation (0900-0900)||1961||2011|
|Days of rain ≥10 mm||Number of days with ≥10 mm precipitation (0900-0900)||1961||2011|
|Days of sleet or snow falling||Number of days with sleet or snow falling||1971||2011|
|Days of snow lying||Number of days with greater than 50% of the ground covered by snow at 0900||1971||2011|
|Mean wind speed at 10 m||Hourly mean wind speed (knots) at a height of 10 m above ground level averaged over the month||1969||2011|
|Mean sea-level pressure||Hourly (or 3-hourly) mean sea-level pressure (hPa) averaged over the month||1961||2011|
|Mean relative humidity||Hourly (or 3-hourly) relative humidity (%) averaged over the month||1961||2011|
|Mean vapour pressure||Hourly (or 3-hourly) vapour pressure (hPa) averaged over the month||1961||2011|
|Mean cloud cover||Hourly (or 3-hourly) total cloud cover (%) averaged over the month||1961||2006|
The monthly data sets are available in two formats.
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