Last updated 22nd October 2019.
Rothamsted Research at Harpenden has the longest run of freely-available daily weather data in England and has been sending returns to the UK Meteorological Office since at least 1878. In 2017, Rothamsted was recognised by the World Meteorological Organization (WMO) as a Centennial Observation Station being one of the relatively small number of sites in the UK that has been recording reliable observations continuously for more than 100 years. Rainfall has been measured daily for more than 160 years, since 1853, using a 5-inch gauge and a much larger, and unusual, 1,000th of an acre gauge. Subsequently, other weather variables were added to the list including temperature from about 1878, sunshine hours from 1890, and wind force/speed from 1915. Weather variables were recorded manually until the end of 2003; an automatic data logger was installed to record the data electronically from 1st January 2004.
These daily weather data at Rothamsted has been summarised to generate 30-year mean sets of weather data 1961-1990, 1971-2000 and 1981-2010. The next set, 1991-2020, will be created in 2021. In referring to these data sets, please use the approrporate DOI and citation available on those pages.
Rothamsted Research (2019). Rothamsted 30-year meteorological means 1981-2010. Electronic Rothamsted Archive https://doi.org/10.23637/OARES30YrMeans8180
Rothamsted Research (2019). Rothamsted 30-year meteorological means 1971-2000. Electronic Rothamsted Archive https://doi.org/10.23637/OARES30YrMeans7100
Rothamsted Research (2019). Rothamsted 30-year meteorological means 1961-1990. Electronic Rothamsted Archive https://doi.org/10.23637/OARES30YrMeans6190
Contact the e-RA Curators to arrange a password to download original raw daily weather data from the e-RA database.
Annual Mean Air Temperature at Rothamsted (1878-2013) e-RA Open Access data
Centennial Recognition for 'Memories of Weather' Met Office December 2018
Major Contribution to Climate Science Recognised Rothamsted Research News December 2018