Measurements: Rainfall - Total monthly rainfall including all precipitation (snow, rain, mist and fog) captured in a 12.7 cm rain gauge (mm per month); numbers of days with rain (0.2mm or more); the day with the maximum daily rainfall for that month. Sun shine: the total hours of sunshine recorded for the month; the day with most hours of sunshine; days when no sunshine recorded. Air temperature: the average maximum and average minimum air temperature (degrees C) for the month; the warmest day; the coldest day for the month. Frost: Numbers of air or ground frosts. The average refers to the 30-year mean 1981-2010.

The summary report is derived from daily data measured at Rothamsted Research. Teses original raw data are available from the e-RA database. Daily data verification includes checks for instrument errors, missing data and outliers. These weather summaries are reported in the local Harpenden press on a monthly basis.

Monthly and summaries and annual summary of rainfall, temperature, sun hours and numbers of ground frosts for 2013. Variation noted in comparison to 30-year means 1981-2010.

This report consists of the monthly and annual summaries of meteorological data measured at Rothamsted Research, Harpenden, UK, from January 2013 until December 2013.

Daily measurements are taken at Rothamsted Meteorological Station. These data are summarised monthly and annually as a report.