Reference Data in Nagano 11 indicators covering reference data for Nagano. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 105.54 Degree days 2025 up 11.6% 640th Cooling and heating degree days - Cities and FUAs — Change in cooling 21.86 Degree days 2025 up 101.1% 367th Cooling and heating degree days - Cities and FUAs 2,520 Degree days 2025 down 6.3% 170th Cooling and heating degree days - Cities and FUAs — Change in heating -507.7 Degree days 2025 down 50.7% 1080th Precipitation - Cities and FUAs — Extreme precipitation days 39.77 Days per year 2024 up 48.3% 33rd Precipitation - Cities and FUAs — Change in extreme precipitation 10.06 Days per year 2024 up 448.3% 45th Dependency ratio - Cities and FUAs 53.6 Percentage of population aged 15-64 years 2020 up 31.4% 24th 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 -5.3 Percentage of national value 2025 down 189.8% 1051st Internet speed - Cities and FUAs — Uploading speed -3.1 Percentage of national value 2025 down 120.0% 788th