The United Kingdom recorded its hottest-ever year in 2022, with an average temperature of ***** degrees Celsius. Since the start of temperature recording in ****, the ** warmest years recorded in the UK have been from 2003 onwards. Weather conditions are predicted to become more extreme due to climate change.

The United Kingdom's hottest summer ever recorded was in 2018, with an average temperature of ***** degrees Celsius. Meanwhile, 2023 saw the eighth hottest summer in the UK, with an average temperature of ***** degrees. In the last couple of decades, five of the top 10 warmest summers in the UK were recorded. New temperature records in 2022 In summer 2022, record-breaking temperatures of more than ** degrees Celsius were recorded at several locations across the UK. Accordingly, 2022 was also the UK's warmest year on record, with the average annual temperature rising above ** degrees Celsius for the first time. Since temperature recording began in ****, the hottest years documented in the country have all occurred after 2003. England: the warmest country in the UK Amongst the countries that comprise the United Kingdom, England has generally seen the highest annual mean temperatures. In 2022, England’s average temperature also reached a new record high, at nearly ** degrees Celsius. And while it’s not a typical sight in the United Kingdom, England also registered the most hours of sunshine on average, with Scotland being the gloomiest country out of the four.

While 2023 ranked as England's second-hottest year in over a century, the highest mean temperature in the country was recorded one year earlier, at an average of 10.93 degrees Celsius. This was almost one degree warmer than the average UK temperature that year. England's hottest ever summer was also recorded in 2022, with temperatures averaging 17.1 degrees Celsius. Nine of England's 10 hottest years have all been recorded since 2006.

This dataset is maintained by Max Eastwood (m.w.eastwood@lboro.ac.uk), Building Energy Research Group (BERG), School of Architecture, Building and Civil Engineering, Loughborough University.

This dataset provides the measured indoor dry bulb temperatures and surrounding weather conducted in the Loughborough Matched Pair test houses during summer 2022. The dataset is made publicly available here. This dataset includes: 1. README.txt: A Read Me file with more details of the study and the dataset. 2. Dataset_descriptor.pdf: a guidance document containing information on the measurment work carried out. 3. West_AT_10minute.csv: 10-minute dry bulb temperature measured in the West house (AT = Air Temperature) 4. East_AT_10minute.csv: 10-minute dry bulb temperature measured in the East house 5. Weather_20second.csv: 20-second weather data compiled from the test house weather station. Other information on the houses' geometry and construction can be found here: https://doi.org/10.17028/rd.lboro.8094575

In 2022, several locations across the United Kingdom exceeded temperatures of more than ** degrees Celsius for the time time on record. The village of Coningsby in eastern England reached **** degrees Celsius on July 19, 2022. That same day, temperatures at Heathrow and St James's Park in London, as well as Pitsford, Northamptonshire, also recorded a maximum temperature of over ** degrees Celsius. 2022 was the UK's hottest year on record.

England's hottest summers ever recorded were in 2022 and 2018, both with an average temperature of **** degrees Celsius. During summer 2022, record-breaking temperatures exceeding ** degrees Celsius were reached at several locations in England, such as Heathrow and St James's Park in London.

[Updated 28/01/25 to fix an issue in the ‘Lower’ values, which were not fully representing the range of uncertainty. ‘Median’ and ‘Higher’ values remain unchanged. The size of the change varies by grid cell and fixed period/global warming levels but the average difference between the 'lower' values before and after this update is 0.2.]What does the data show? The Annual Count of Hot Summer Days is the number of days per year where the maximum daily temperature is above 30°C. It measures how many times the threshold is exceeded (not by how much) in a year. Note, the term ‘hot summer days’ is used to refer to the threshold and temperatures above 30°C outside the summer months also contribute to the annual count. The results should be interpreted as an approximation of the projected number of days when the threshold is exceeded as there will be many factors such as natural variability and local scale processes that the climate model is unable to represent.The Annual Count of Hot Summer Days is calculated for two baseline (historical) periods 1981-2000 (corresponding to 0.51°C warming) and 2001-2020 (corresponding to 0.87°C warming) and for global warming levels of 1.5°C, 2.0°C, 2.5°C, 3.0°C, 4.0°C above the pre-industrial (1850-1900) period. This enables users to compare the future number of hot summer days to previous values.What are the possible societal impacts?The Annual Count of Hot Summer Days indicates increased health risks, transport disruption and damage to infrastructure from high temperatures. It is based on exceeding a maximum daily temperature of 30°C. Impacts include:Increased heat related illnesses, hospital admissions or death.Transport disruption due to overheating of railway infrastructure. Overhead power lines also become less efficient. Other metrics such as the Annual Count of Summer Days (days above 25°C), Annual Count of Extreme Summer Days (days above 35°C) and the Annual Count of Tropical Nights (where the minimum temperature does not fall below 20°C) also indicate impacts from high temperatures, however they use different temperature thresholds.What is a global warming level?The Annual Count of Hot Summer Days is calculated from the UKCP18 regional climate projections using the high emissions scenario (RCP 8.5) where greenhouse gas emissions continue to grow. Instead of considering future climate change during specific time periods (e.g. decades) for this scenario, the dataset is calculated at various levels of global warming relative to the pre-industrial (1850-1900) period. The world has already warmed by around 1.1°C (between 1850–1900 and 2011–2020), whilst this dataset allows for the exploration of greater levels of warming. The global warming levels available in this dataset are 1.5°C, 2°C, 2.5°C, 3°C and 4°C. The data at each warming level was calculated using a 21 year period. These 21 year periods are calculated by taking 10 years either side of the first year at which the global warming level is reached. This time will be different for different model ensemble members. To calculate the value for the Annual Count of Hot Summer Days, an average is taken across the 21 year period. Therefore, the Annual Count of Hot Summer Days show the number of hot summer days that could occur each year, for each given level of warming. We cannot provide a precise likelihood for particular emission scenarios being followed in the real world future. However, we do note that RCP8.5 corresponds to emissions considerably above those expected with current international policy agreements. The results are also expressed for several global warming levels because we do not yet know which level will be reached in the real climate as it will depend on future greenhouse emission choices and the sensitivity of the climate system, which is uncertain. Estimates based on the assumption of current international agreements on greenhouse gas emissions suggest a median warming level in the region of 2.4-2.8°C, but it could either be higher or lower than this level.What are the naming conventions and how do I explore the data?This data contains a field for each global warming level and two baselines. They are named ‘HSD’ (where HSD means Hot Summer Days), the warming level or baseline, and ‘upper’ ‘median’ or ‘lower’ as per the description below. E.g. ‘Hot Summer Days 2.5 median’ is the median value for the 2.5°C warming level. Decimal points are included in field aliases but not field names e.g. ‘Hot Summer Days 2.5 median’ is ‘HotSummerDays_25_median’. To understand how to explore the data, see this page: https://storymaps.arcgis.com/stories/457e7a2bc73e40b089fac0e47c63a578Please note, if viewing in ArcGIS Map Viewer, the map will default to ‘HSD 2.0°C median’ values.What do the ‘median’, ‘upper’, and ‘lower’ values mean?Climate models are numerical representations of the climate system. To capture uncertainty in projections for the future, an ensemble, or group, of climate models are run. Each ensemble member has slightly different starting conditions or model set-ups. Considering all of the model outcomes gives users a range of plausible conditions which could occur in the future. For this dataset, the model projections consist of 12 separate ensemble members. To select which ensemble members to use, the Annual Count of Hot Summer Days was calculated for each ensemble member and they were then ranked in order from lowest to highest for each location. The ‘lower’ fields are the second lowest ranked ensemble member. The ‘upper’ fields are the second highest ranked ensemble member. The ‘median’ field is the central value of the ensemble.This gives a median value, and a spread of the ensemble members indicating the range of possible outcomes in the projections. This spread of outputs can be used to infer the uncertainty in the projections. The larger the difference between the lower and upper fields, the greater the uncertainty.‘Lower’, ‘median’ and ‘upper’ are also given for the baseline periods as these values also come from the model that was used to produce the projections. This allows a fair comparison between the model projections and recent past. Useful linksThis dataset was calculated following the methodology in the ‘Future Changes to high impact weather in the UK’ report and uses the same temperature thresholds as the 'State of the UK Climate' report.Further information on the UK Climate Projections (UKCP).Further information on understanding climate data within the Met Office Climate Data Portal.

The annual mean temperature in the United Kingdom has fluctuated greatly since 1990. Temperatures during this period were at their highest in 2022, surpassing ** degrees Celsius. In 2010, the mean annual temperature stood at **** degrees, the lowest recorded during this time. Daily temperatures Average daily temperatures have remained stable since the turn of the century, rarely dropping below ** degrees Celsius. In 2010, they dropped to a low of **** degrees Celsius. The peak average daily temperature was recorded in 2022 when it reached **** degrees. This was an increase of *** degree Celsius compared to the long-term mean, and the most positive deviation during the period of consideration. Highs and lows The maximum average temperature recorded across the UK since 2015 was in July 2018. This month saw a maximum temperature of **** degrees Celsius. In comparison, the lowest monthly minimum temperature was in February of the same year, at just minus *** degrees. This was an especially cold February, as the previous year the minimum temperature for this month was *** degrees.

Future hot summer years to be used for assessing risk of overheating and heat stress under a changing climate. They were created in two alternative ways: one is based on Weighted Cooling Degree Hours, the other is based on Physiologically Equivalent Temperature.

The highest average temperature recorded in 2024 until November was in August, at 16.8 degrees Celsius. Since 2015, the highest average daily temperature in the UK was registered in July 2018, at 18.7 degrees Celsius. The summer of 2018 was the joint hottest since institutions began recording temperatures in 1910. One noticeable anomaly during this period was in December 2015, when the average daily temperature reached 9.5 degrees Celsius. This month also experienced the highest monthly rainfall in the UK since before 2014, with England, Wales, and Scotland suffering widespread flooding. Daily hours of sunshine Unsurprisingly, the heat wave that spread across the British Isles in 2018 was the result of particularly sunny weather. July 2018 saw an average of 8.7 daily sun hours in the United Kingdom. This was more hours of sun than was recorded in July 2024, which only saw 5.8 hours of sun. Temperatures are on the rise Since the 1960s, there has been an increase in regional temperatures across the UK. Between 1961 and 1990, temperatures in England averaged nine degrees Celsius, and from 2013 to 2022, average temperatures in the country had increased to 10.3 degrees Celsius. Due to its relatively southern location, England continues to rank as the warmest country in the UK.

These layers are the outputs of research which developed a national river temperature model for Scotland capable of predicting both daily maximum river temperature and sensitivity to climate change. The layers show the following: summer_max_tw_2015_16 - Predictions of maximum daily river temperatures for the hottest day between July 2015 and June 2016. summer_max_tw_2003 - Predictions of maximum daily river temperatures for the hottest year in the last 20 years (2003). summer_climate_change_sensitivity - Predictions of the change in river temperature that would result from a 1degC increase in air temperature. A fourth layer has been developed to combine the outputs from 'summer_max_tw_2003' and 'summer_climate_change_sensitivity' into a single layer that can be used to prioritise management where the relative importance of maximum temperature and temperature change are considered to be equal. This was achieved by (1) dividing the predictions of 'summer_max_tw_2003' and 'summer_climate_change_sensitivity' into 5 equal categories between the minimum and maximum observed values (2) assigning these categories a value ranging from 1 (the hottest / most sensitive rivers) to 5 (the coolest / least sensitive rivers) (3) sum the rankings (-1) to produce an overall priority ranking (1:9) where rivers ranked as 1 are the highest priority for management (i.e. high river temperature and high climate sensitivity) and 9 the lowest. Management_Priority_Layer - Management priority on a scale of 1:9 where 1 is the highest priority (i.e. high river temperature and high climate sensitivity) and 9 the lowest. * Please Note * This layer was derived by the Scottish Government from a licensed dataset. It is not downloadable or routinely available. The data can be shared on request if a user provides evidence that they hold a licence from the UK Centre for Ecology and Hydrology (UKCEH) for the 1:50,000 Digital River Network (https://www.ceh.ac.uk/data/15000-watercourse-network)

'''DEFINITION''' The subsurface temperature anomaly has been derived from the regional reanalysis of the CMEMS NWS MFC group for the North-West European Shelf Seas (product reference NWSHELF_MULTIYEAR_PHY_004_009). Horizontal averaging has been conducted over just the shelf, defined as the contiguous region surrounding the UK where sea depth is no more than 200m. The profiles of the annual mean temperature anomaly have been calculated relative to the reference period of 1993-2019. The time series shows monthly anomalies calculated from monthly means. CMEMS Ocean State Report (Mulet et al., 2018) gives the broader context for these anomalies.

'''CONTEXT''' The North-West European Shelf Seas are the waters on the continental shelf adjoining the North-East Atlantic. Geographically, they can be divided into 5 regions: the North Sea, the English Channel, the Celtic Sea, the Irish Sea, and the North-Western Approaches. The temperatures in these seas is moderated by inflow from the North Atlantic Drift (a continuation of the Gulf Stream), into the Irish Sea and English Channel from the south-west and into the North Sea from the north and north-west. In Winter, this Atlantic water maintains surface temperatures no colder than 10°C in western regions. Cooler temperatures, below 3°C, can occur in eastern parts near continental coasts. In Summer, those eastern coastal regions can warm to as much as 18°C, especially in the shallow waters of the southern North Sea. Stratification occurs in the Summer months, starting around May in the northern part of the domain, and then extending southwards (Paramor et al., 2009). Currents are dominated by the strong semi-diurnal tides which act to mix the water and reduce stratification. This is especially noticeable in the shallow southern North Sea.

'''CMEMS KEY FINDINGS''' Interannual variations of the subsurface temperature anomaly averaged across the domain range from -1°C to +1°C within the upper 100-m deep layer over the period 1993-2019. There is some long-term variability, with warm anomalies for most of the first decade of the 21st century. This is a decade in which 6 of the 10 warmest years on record occurred for air temperature over the UK (Kendon et al., 2019). The 4 other warmest years for UK climate were 2011, 2014, 2017 and 2018. 2011 and 2017 correspond to warm anomalies through the depth of the Shelf. 2018 saw an unusually hot Summer heatwave for the atmosphere, which is reflected in a short-lived and shallow warm anomaly (to 25m depth) in the reanalysis. 2014 was for UK climate the hottest year on record. This corresponds to a stronger and longer-lived anomaly in the reanalysis, but only down to around 75m depth. Temperatures in deeper layers may be moderated by inflow to the region from the North Atlantic drift. 2019 was overall slightly warmer than average in near-surface layers, and slightly cooler below 100m depth.

England's highest monthly mean air temperatures are typically recorded in July and August of each year. Since 2015, the warmest mean temperature was measured in July 2018 at 18.8 degrees Celsius. On the other hand, February of that same year registered the coolest temperature, at 2.6 degrees Celsius. In April 2025, the mean air temperature was 10.3 degrees Celsius, slightly higher than the same month the previous year. The English weather England is the warmest region in the United Kingdom and the driest. In 2024, the average annual temperature in England amounted to 10.73 degrees Celsius – around 1.1 degrees above the national mean. That same year, precipitation in England stood at about 1,020 millimeters. By contrast, Scotland – the wettest region in the UK – recorded over 1,500 millimeters of rainfall in 2024. Temperatures on the rise Throughout the last decades, the average temperature in the United Kingdom has seen an upward trend, reaching a record high in 2022. Global temperatures have experienced a similar pattern over the same period. This gradual increase in the Earth's average temperature is primarily due to various human activities, such as burning fossil fuels and deforestation, which lead to the emission of greenhouse gases. This phenomenon has severe consequences, including more frequent and intense weather events, rising sea levels, and adverse effects on human health and the environment.

After the 2013 heat wave, we conducted three UK-wide online surveys to examine public responses to heat. Participants in the longitudinal sample were surveyed in October 2013, April 2014, and July 2014. Participants in the refreshment sample were surveyed in July 2014. This UK-wide project examines whether UK residents’ positive feelings about hot summer weather did indeed undermine their willingness to implement heat protection behaviours during the 2013 heat wave. It also tests four strategies for promoting heat protection behaviours, including ones that invoke negative memories about extreme summer heat. Follow-up work will apply any new insights to other extreme weather events, like floods, droughts or snow. Findings will impact theory and practice about how to design effective risk communication, and help to promote public preparedness and resilience regarding extreme weather.Heat waves cause excess deaths, illness and discomfort. Although heat waves have been relatively rare in the UK, they are projected to become more common and intense under a changing climate. The summer of 2013 brought the first heat wave in seven years. To promote public protection against heat, the National Health Service and Public Health England released a heat wave plan. Recommended heat protection behaviours include staying in the shade, drinking plenty of liquids, and keeping an eye on vulnerable individuals. However, there is reason to believe that UK residents often have positive feelings about hot summer weather, which may undermine their willingness to implement recommended heat protection behaviours. Online surveys. Participants were randomly assigned to a no-instruction control group, or a group that was instructed to remember (a) high summer temperatures, (b) negative summer weather experiences, (c) negative summer weather experiences with high temperatures. Participants reported heat protection behaviors, trust in the agencies that release the heat wave plan, feelings about heat, and so on.

Since January 2015, the highest maximum monthly temperature in England was measured in July 2018, at 24.8 degrees Celsius. July temperatures declined in the following years, and measured 20.6 degrees Celsius in 2024. Further information about the weather in the United Kingdom can be found here.

During the heat wave in 2022, the highest temperature recorded in the United Kingdom was **** degrees Celsius on ******* at Coningsby, Lincolnshire. An unprecedented extreme heatwave was experienced in the United Kingdom from ** to ** *********, and extreme temperatures at over 40°C were recorded for the first time since recording of temperatures began.

This dataset provides values for TEMPERATURE reported in several countries. The data includes current values, previous releases, historical highs and record lows, release frequency, reported unit and currency.

Detailed data breakdowns for estimated productivity (gross value added) lost on hot days in Great Britain and other relevant heat-related productivity loss estimates used in our methodology. These are official statistics in development.

Data for Figure SPM.6 from the Summary for Policymakers (SPM) of the Working Group I (WGI) Contribution to the Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment Report (AR6). Figure SPM.6 shows projected changes in the intensity and frequency of extreme temperature, extreme precipitation and droughts. --------------------------------------------------- How to cite this dataset --------------------------------------------------- When citing this dataset, please include both the data citation below (under 'Citable as') and the following citation for the report component from which the figure originates: IPCC, 2021: Summary for Policymakers. In: Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change [Masson-Delmotte, V., P. Zhai, A. Pirani, S.L. Connors, C. Péan, S. Berger, N. Caud, Y. Chen, L. Goldfarb, M.I. Gomis, M. Huang, K. Leitzell, E. Lonnoy, J.B.R. Matthews, T.K. Maycock, T. Waterfield, O. Yelekçi, R. Yu, and B. Zhou (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, pp. 3−32, doi:10.1017/9781009157896.001. --------------------------------------------------- Figure subpanels --------------------------------------------------- The figure has four panels, with data provided for all panels in subdirectories named panel_a, panel_b, panel_c and panel_d. --------------------------------------------------- List of data provided --------------------------------------------------- This dataset contains: - Changes in annual maximum temperature (TXx) extremes for intensity (°C) and frequency (-) for 1 in 10 year and 1 in 50 year events (relative to 1850-1900) - Changes in annual maximum 1-day precipitation (Rx1day) extremes for intensity (%) and frequency (-) for 1 in 10 year events (relative to 1850-1900) - Changes in soil moisture-based drought events for intensity (standard deviation) and frequency (-) for 1 in 10 year events (relative to 1850-1900) --------------------------------------------------- Data provided in relation to figure --------------------------------------------------- Panel a: - Data file: panel_a/TXx_freq_change_10_year_event.csv ('Hot temperature extremes') [column 2 dark dots, columns 5 and 6 light dots] - Data file: panel_a/TXx_intens_change_10_year_event.csv ('Hot temperature extremes') [column 2 dark bars, columns 5 and 6 light bars] Panel b: - Data file: panel_b/TXx_freq_change_50_year_event.csv ('Hot temperature extremes') [column 2 dark dots, columns 5 and 6 light dots] - Data file: panel_b/TXx_intens_change_50_year_event.csv ('Hot temperature extremes') [column 2 dark bars, columns 5 and 6 light bars] Panel c: - Data file: panel_c/Rx1day_freq_change_10_year_event.csv ('Extreme precipitation over land') [column 2 dark dots, columns 5 and 6 light dots] - Data file: panel_c/Rx1day_intens_change_10_year_event.csv ('Extreme precipitation over land') [column 2 dark bars, columns 5 and 6 light bars] Panel d: - Data file: panel_d/drought_freq_change_10_year_event.csv ('Drought') [column 2 dark dots, columns 5 and 6 light dots] - Data file: panel_d/drought_intens_change_10_year_event.csv ('Drought') [column 2 dark bars, columns 5 and 6 light bars] --------------------------------------------------- Notes on reproducing the figure from the provided data --------------------------------------------------- - The 50th, 5th, and 95th percentiles are shown on the figure (lines on the bars). - The drought intensity shows 'drying' while the data file shows the change in soil moisture (i.e., a negative soil moisture change corresponds to a positive drying signal). --------------------------------------------------- Sources of additional information --------------------------------------------------- The following weblink is provided in the Related Documents section of this catalogue record: - - Link to the report webpage, which includes the report component containing the figure (Summary for Policymakers) and the Supplementary Material for Chapter 11, which contains details on the input data used in Table 11.SM.9. (Figures 11.15, 11.6, 11.7, 11.12, and 11.18)

After three years of growth, the UK hot-rolled round stainless steel market decreased by -6.9% to $880M in 2024. Overall, the total consumption indicated a moderate expansion from 2012 to 2024: its value increased at an average annual rate of +3.9% over the last twelve-year period. The trend pattern, however, indicated some noticeable fluctuations being recorded throughout the analyzed period. Hot-rolled round stainless steel consumption peaked at $945M in 2023, and then dropped in the following year.