Reference Data in San Sebastián/Donostia 11 indicators covering reference data for San Sebastián/Donostia. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 48.13 Degree days 2025 down 18.3% 776th Cooling and heating degree days - Cities and FUAs — Change in cooling 3.18 Degree days 2025 down 77.2% 445th Cooling and heating degree days - Cities and FUAs 1,318 Degree days 2025 up 9.4% 763rd Cooling and heating degree days - Cities and FUAs — Change in heating -28.43 Degree days 2025 up 79.9% 155th Precipitation - Cities and FUAs — Extreme precipitation days 19.17 Days per year 2024 up 2.7% 199th Precipitation - Cities and FUAs — Change in extreme precipitation 4.77 Days per year 2024 up 11.7% 179th Dependency ratio - Cities and FUAs 38.9 Percentage of population aged 15-64 years 2022 up 20.8% 210th Wind threats - Cities and FUAs — Exposure to wind threats 0 Percentage of area 2023 — 273rd Coastal flooding - Cities and FUAs — Built-up area exposure to 0 Percentage of built-up area 2022 — 277th Internet speed - Cities and FUAs — Downloading speed 7.2 Percentage of national value 2025 down 20.9% 586th Internet speed - Cities and FUAs — Uploading speed 12 Percentage of national value 2025 up 355.3% 446th