Reference Data in Swansea 11 indicators covering reference data for Swansea. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 1.3 Degree days 2025 up 93.2% 1209th Cooling and heating degree days - Cities and FUAs — Change in cooling -1.67 Degree days 2025 up 27.4% 508th Cooling and heating degree days - Cities and FUAs 1,563 Degree days 2025 down 10.5% 655th Cooling and heating degree days - Cities and FUAs — Change in heating -344.32 Degree days 2025 down 112.8% 700th Precipitation - Cities and FUAs — Extreme precipitation days 11.6 Days per year 2024 up 36.5% 412th Precipitation - Cities and FUAs — Change in extreme precipitation 1.34 Days per year 2024 up 176.3% 596th Dependency ratio - Cities and FUAs 31.6 Percentage of population aged 15-64 years 2024 up 6.4% 481st Wind threats - Cities and FUAs — Exposure to wind threats 100 Percentage of area 2023 unchanged 1st Coastal flooding - Cities and FUAs — Built-up area exposure to 0.739 Percentage of built-up area 2022 up 10.4% 118th Internet speed - Cities and FUAs — Downloading speed 4.5 Percentage of national value 2025 down 63.4% 707th Internet speed - Cities and FUAs — Uploading speed 7.4 Percentage of national value 2025 up 355.2% 557th