Reference Data in London 20 indicators covering reference data for London. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree -55.27 % change on previous year 2025 down 148.2% 845th Cooling and heating degree days - Cities and FUAs — Change in cooling -292.1 % change on previous year 2025 down 127.7% 1168th Cooling and heating degree days - Cities and FUAs, annual growth rate -9.67 % change on previous year 2025 down 222.8% 754th Cooling and heating degree days - Cities and FUAs — Change in heating -71.9 % change on previous year 2025 down 303.8% 890th Cooling and heating degree days - Cities and FUAs — Change in heating -403.83 Degree days 2025 down 72.5% 840th Cooling and heating degree days - Cities and FUAs 1,579 Degree days 2025 down 9.7% 641st Cooling and heating degree days - Cities and FUAs — Cooling degree 9.19 Degree days 2025 down 16.7% 1083rd Cooling and heating degree days - Cities and FUAs — Change in cooling -7.46 Degree days 2025 down 32.8% 639th Precipitation - Cities and FUAs — Extreme precipitation days 1.46 Days per year 2024 up 33.8% 1174th Precipitation - Cities and FUAs — Change in extreme precipitation 0.1413 Days per year 2024 up 162.4% 832nd Dependency ratio - Cities and FUAs 18 Percentage of population aged 15-64 years 2024 up 4.7% 1051st Wind threats - Cities and FUAs — Exposure to wind threats 0 Percentage of area 2023 down 100.0% 271st Coastal flooding - Cities and FUAs — Built-up area exposure to 2.57 Percentage of built-up area 2022 up 5.3% 92nd Internet speed - Cities and FUAs — Downloading speed 15.1 Percentage of national value 2025 down 25.6% 321st Internet speed - Cities and FUAs — Uploading speed 49.3 Percentage of national value 2025 up 74.8% 76th Correction coefficients outside the European Union (Duty stations) 104.5 Index 2025 up 7.1% 33rd Purchasing Power Parities outside the European Union (Duty stations) 0.8912 Purchasing power standard (PPS) 2025 down 0.3% 141st Correction coefficients outside the European Union (Duty stations) 104.5 Index 2025 up 7.1% 31st Correction coefficients in the European Union (Duty stations) - index 132.9 Index 2019 up 10.5% 1st Purchasing Power Parities in the European Union (Duty stations) 1.19 Index 2019 up 9.1% 9th