Reference Data in Bielefeld 11 indicators covering reference data for Bielefeld. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 28.54 Degree days 2025 down 55.0% 887th Cooling and heating degree days - Cities and FUAs — Change in cooling -15.35 Degree days 2025 down 178.8% 802nd Cooling and heating degree days - Cities and FUAs 1,927 Degree days 2025 down 8.1% 433rd Cooling and heating degree days - Cities and FUAs — Change in heating -467.44 Degree days 2025 down 57.1% 1013th Precipitation - Cities and FUAs — Extreme precipitation days 5 Days per year 2024 up 89.6% 756th Precipitation - Cities and FUAs — Change in extreme precipitation 2.75 Days per year 2024 up 613.0% 357th Dependency ratio - Cities and FUAs 31.1 Percentage of population aged 15-64 years 2025 up 3.0% 508th 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 -1.8 Percentage of national value 2025 up 18.2% 947th Internet speed - Cities and FUAs — Uploading speed -20.2 Percentage of national value 2025 up 36.5% 1058th