Reference Data in Viseu 11 indicators covering reference data for Viseu. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 230.08 Degree days 2025 up 8.1% 461st Cooling and heating degree days - Cities and FUAs — Change in cooling 38.49 Degree days 2025 up 81.5% 322nd Cooling and heating degree days - Cities and FUAs 1,045 Degree days 2025 down 11.6% 871st Cooling and heating degree days - Cities and FUAs — Change in heating -305.42 Degree days 2025 down 81.1% 632nd Precipitation - Cities and FUAs — Extreme precipitation days 13.54 Days per year 2024 down 45.0% 353rd Precipitation - Cities and FUAs — Change in extreme precipitation -1.09 Days per year 2024 down 110.9% 1101st Dependency ratio - Cities and FUAs 39.3 Percentage of population aged 15-64 years 2024 up 26.8% 195th 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 Percentage of built-up area 2022 — 277th Internet speed - Cities and FUAs — Downloading speed -7.3 Percentage of national value 2025 up 56.5% 1097th Internet speed - Cities and FUAs — Uploading speed -5.4 Percentage of national value 2025 up 56.1% 834th