Reference Data in Naha 15 indicators covering reference data for Naha. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 1,056 Degree days 2025 up 14.5% 61st Cooling and heating degree days - Cities and FUAs — Change in cooling 233.32 Degree days 2025 up 133.5% 29th Cooling and heating degree days - Cities and FUAs 19.55 Degree days 2025 down 3.7% 1232nd Cooling and heating degree days - Cities and FUAs — Change in heating -1.75 Degree days 2025 down 75.7% 108th Cooling and heating degree days - Cities and FUAs — Change in heating 88.72 % change on previous year 2025 down 1.5% 103rd Cooling and heating degree days - Cities and FUAs, annual growth rate 239.43 % change on previous year 2025 up 198.1% 1st Cooling and heating degree days - Cities and FUAs — Change in cooling -20.98 % change on previous year 2025 down 110.1% 165th Cooling and heating degree days - Cities and FUAs — Cooling degree -5.54 % change on previous year 2025 down 170.3% 145th Precipitation - Cities and FUAs — Extreme precipitation days 25 Days per year 2024 down 12.3% 118th Precipitation - Cities and FUAs — Change in extreme precipitation 3.13 Days per year 2024 down 52.8% 302nd Dependency ratio - Cities and FUAs 34.9 Percentage of population aged 15-64 years 2020 up 42.4% 328th Wind threats - Cities and FUAs — Exposure to wind threats 100 Percentage of area 2023 unchanged 1st Coastal flooding - Cities and FUAs — Built-up area exposure to 0.0031 Percentage of built-up area 2022 down 54.6% 271st Internet speed - Cities and FUAs — Downloading speed -34.9 Percentage of national value 2025 down 53.1% 1290th Internet speed - Cities and FUAs — Uploading speed -18 Percentage of national value 2025 down 42.9% 1017th