Reference Data in Iserlohn 11 indicators covering reference data for Iserlohn. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 24.82 Degree days 2025 down 51.5% 920th Cooling and heating degree days - Cities and FUAs — Change in cooling -6.44 Degree days 2025 down 132.3% 625th Cooling and heating degree days - Cities and FUAs 1,993 Degree days 2025 down 9.8% 395th Cooling and heating degree days - Cities and FUAs — Change in heating -503.5 Degree days 2025 down 74.8% 1073rd Precipitation - Cities and FUAs — Extreme precipitation days 5.5 Days per year 2024 up 17.8% 695th Precipitation - Cities and FUAs — Change in extreme precipitation 2.16 Days per year 2024 up 62.7% 442nd Dependency ratio - Cities and FUAs 38.6 Percentage of population aged 15-64 years 2025 up 15.6% 217th 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 8.3 Percentage of national value 2025 down 23.9% 541st Internet speed - Cities and FUAs — Uploading speed -32.2 Percentage of national value 2025 down 54.1% 1190th