Reference Data in Viana do Castelo 11 indicators covering reference data for Viana do Castelo. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 69.89 Degree days 2025 up 33.3% 718th Cooling and heating degree days - Cities and FUAs — Change in cooling 11.88 Degree days 2025 up 312.0% 409th Cooling and heating degree days - Cities and FUAs 879.04 Degree days 2025 up 11.0% 933rd Cooling and heating degree days - Cities and FUAs — Change in heating -21.44 Degree days 2025 up 80.3% 140th Precipitation - Cities and FUAs — Extreme precipitation days 29.57 Days per year 2024 down 21.9% 74th Precipitation - Cities and FUAs — Change in extreme precipitation 1.84 Days per year 2024 down 81.8% 500th Dependency ratio - Cities and FUAs 44 Percentage of population aged 15-64 years 2024 up 38.4% 94th Wind threats - Cities and FUAs — Exposure to wind threats 0 Percentage of area 2023 down 100.0% 273rd Coastal flooding - Cities and FUAs — Built-up area exposure to 0.2088 Percentage of built-up area 2022 up 11.0% 156th Internet speed - Cities and FUAs — Downloading speed -5.2 Percentage of national value 2025 down 766.7% 1047th Internet speed - Cities and FUAs — Uploading speed -8.2 Percentage of national value 2025 down 158.2% 870th