Reference Data in Helsinki/Helsingfors 11 indicators covering reference data for Helsinki/Helsingfors. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 11.8 Degree days 2025 up 86.0% 1063rd Cooling and heating degree days - Cities and FUAs — Change in cooling -4.45 Degree days 2025 up 55.1% 580th Cooling and heating degree days - Cities and FUAs 3,228 Degree days 2025 up 5.7% 45th Cooling and heating degree days - Cities and FUAs — Change in heating -525.14 Degree days 2025 up 25.0% 1097th Precipitation - Cities and FUAs — Extreme precipitation days 2.67 Days per year 2024 up 166.7% 1035th Precipitation - Cities and FUAs — Change in extreme precipitation 1.47 Days per year 2024 up 849.0% 574th Dependency ratio - Cities and FUAs 25.8 Percentage of population aged 15-64 years 2024 up 9.8% 789th 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 4.78 Percentage of built-up area 2022 up 16.6% 74th Internet speed - Cities and FUAs — Downloading speed 0.2 Percentage of national value 2025 down 99.3% 883rd Internet speed - Cities and FUAs — Uploading speed -6.9 Percentage of national value 2025 down 198.6% 855th