This dataset contains the total monthly and annual rainfall, at Rothamsted from 1853 - 2024 and is based on continuous daily records measured at the site. The chart shows the annual data for illustrative purposes and the complete set of monthly data (and annual data) is available in the downloadable data file.

The dataset provides the monthly and annual air temperature recorded at Rothamsted every year from 1878-2024.The figure shows the maximum annual-maximums, the mean annual-means, and the minimum minimum annual temperatures, every year 1878-2024. It shows how all have risen, but in particular the minimum temperatures have risen most steeply over the 146 years of readings (minimum temperatures generally indicate night-time temperatures and hence it is these that have increased more). In addition, it can be seen that temperatures have in particular increased since the early 1980s.

The dataset provides both the monthly and annual sun hours recorded at Rothamsted every year from 1891-2024. The figure shows a subset example of the data - the total annual hours and the mean annual hours. Summary data used for this chart are derived from daily data measured at Rothamsted Meteorological Station, this was done manually every day until 2004 when it was automated. The annual total hours chart shows this is a general trend towards more sunshine hours per year, however, there was a period from 1963-1987 when total annual sun hours were generally lower than average.

The dataset provides both the monthly and annual sun hours recorded at Rothamsted every year from 1878-2023. The figure shows just a subset example of the data - monthly total sun hours for June and December at Rothamsted 1878-2023. Summary data used for this chart are derived from daily data measured at Rothamsted Meteorological Station.

The dataset provides the monthly mean air temperature at Rothamsted every year from 1878-2023. The figure shows the monthly mean air temperature for June and December at Rothamsted every year from 1878-2023.

This dataset contains the total annual rainfall, at Rothamsted from 1853 - 2023 and is based on continuous daily records measured at the site.

This dataset contains the total monthly rainfall, and total annual rainfall, at Rothamsted from March 1853 - December 2023 and is based on continuous daily records measured at the site.

Rothamsted has one of the longest running continuous sets of meteorological recordings in the world. The figure shows the annual mean air temperature at Rothamsted every year from 1878-2022. Also shown is the mean over each five-year period, 1878-1882, 1883-1887, etc. The red line shows the mean temperature, 1878-1987. Mean annual air temperature has fluctuated considerably, however, when the variation in annual temperature is smoothed using five-year means, it is apparent that air temperatures have risen sharply since 1987 (Scott, 2015). The mean air temperature at Rothamsted in 2022 was 11.23°C which is 2.17°C higher than the 1878-1987 average (9.06°C). The 10 warmest years on record occurred since 1999. Much of the rise in annual mean temperatures is due to temperature increases in the autumn and winter months, and in night-time temperatures.

This dataset consists of the 30-year monthly mean meteorological data measured at Rothamsted Research, Harpenden, UK, from January 1991 until December 2020.

This dataset represents the mean monthly rainfall recorded at Rothamsted from October 1985 - September 2017 and is derived from continuous daily records measured at the site.