Reference Data in Lahti/Lahtis 11 indicators covering reference data for Lahti/Lahtis. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 13.77 Degree days 2025 up 78.7% 1039th Cooling and heating degree days - Cities and FUAs — Change in cooling -5.51 Degree days 2025 up 52.4% 601st Cooling and heating degree days - Cities and FUAs 3,046 Degree days 2025 down 8.2% 61st Cooling and heating degree days - Cities and FUAs — Change in heating -974.79 Degree days 2025 down 38.5% 1304th Precipitation - Cities and FUAs — Extreme precipitation days 0.6495 Days per year 2024 up 159.9% 1260th Precipitation - Cities and FUAs — Change in extreme precipitation -0.8088 Days per year 2024 up 33.1% 1047th Dependency ratio - Cities and FUAs 42 Percentage of population aged 15-64 years 2024 up 23.2% 133rd 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 21 Percentage of national value 2025 down 43.1% 169th Internet speed - Cities and FUAs — Uploading speed -20.9 Percentage of national value 2025 up 5.4% 1066th