Reference Data in Southampton 11 indicators covering reference data for Southampton. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 3.53 Degree days 2025 down 37.5% 1168th Cooling and heating degree days - Cities and FUAs — Change in cooling -10.88 Degree days 2025 down 24.1% 717th Cooling and heating degree days - Cities and FUAs 1,237 Degree days 2025 down 24.9% 806th Cooling and heating degree days - Cities and FUAs — Change in heating -634.47 Degree days 2025 down 183.0% 1189th Precipitation - Cities and FUAs — Extreme precipitation days 6 Days per year 2024 up 260.1% 653rd Precipitation - Cities and FUAs — Change in extreme precipitation 3.94 Days per year 2024 up 1,097.5% 235th Dependency ratio - Cities and FUAs 23.7 Percentage of population aged 15-64 years 2024 up 6.3% 896th Wind threats - Cities and FUAs — Exposure to wind threats 3.86 Percentage of area 2023 down 96.1% 235th Coastal flooding - Cities and FUAs — Built-up area exposure to 0.4567 Percentage of built-up area 2022 up 4.9% 133rd Internet speed - Cities and FUAs — Downloading speed 17.2 Percentage of national value 2025 down 22.5% 266th Internet speed - Cities and FUAs — Uploading speed 56.9 Percentage of national value 2025 up 4,476.9% 46th