Reference Data in Ostrava 11 indicators covering reference data for Ostrava. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 20.36 Degree days 2025 down 86.7% 976th Cooling and heating degree days - Cities and FUAs — Change in cooling -27.08 Degree days 2025 down 125.7% 959th Cooling and heating degree days - Cities and FUAs 2,337 Degree days 2025 down 2.6% 232nd Cooling and heating degree days - Cities and FUAs — Change in heating -477 Degree days 2025 down 15.1% 1034th Precipitation - Cities and FUAs — Extreme precipitation days 5.89 Days per year 2024 down 3.6% 665th Precipitation - Cities and FUAs — Change in extreme precipitation 2.23 Days per year 2024 down 9.1% 430th Dependency ratio - Cities and FUAs 33.3 Percentage of population aged 15-64 years 2025 up 23.3% 405th 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 35.6 Percentage of national value 2025 up 108.2% 51st Internet speed - Cities and FUAs — Uploading speed 35 Percentage of national value 2025 up 786.3% 147th