Reference Data in Hiroshima 11 indicators covering reference data for Hiroshima. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 368.43 Degree days 2025 up 95.1% 321st Cooling and heating degree days - Cities and FUAs — Change in cooling 131.07 Degree days 2025 up 370.1% 135th Cooling and heating degree days - Cities and FUAs 1,709 Degree days 2025 up 11.7% 558th Cooling and heating degree days - Cities and FUAs — Change in heating -11.42 Degree days 2025 up 94.0% 124th Precipitation - Cities and FUAs — Extreme precipitation days 29.73 Days per year 2024 down 5.4% 73rd Precipitation - Cities and FUAs — Change in extreme precipitation 6.13 Days per year 2024 down 21.6% 126th Dependency ratio - Cities and FUAs 43.5 Percentage of population aged 15-64 years 2020 up 39.4% 101st Wind threats - Cities and FUAs — Exposure to wind threats 7.4 Percentage of area 2023 unchanged 214th Coastal flooding - Cities and FUAs — Built-up area exposure to 5.29 Percentage of built-up area 2022 up 1.0% 69th Internet speed - Cities and FUAs — Downloading speed -6.7 Percentage of national value 2025 up 81.6% 1086th Internet speed - Cities and FUAs — Uploading speed -10.4 Percentage of national value 2025 up 56.7% 917th