Reference Data in Niigata 10 indicators covering reference data for Niigata. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 409.75 Degree days 2025 up 72.2% 280th Cooling and heating degree days - Cities and FUAs — Change in cooling 181.06 Degree days 2025 up 1,868.8% 64th Cooling and heating degree days - Cities and FUAs 1,605 Degree days 2025 up 0.7% 621st Cooling and heating degree days - Cities and FUAs — Change in heating -226.32 Degree days 2025 up 4.5% 502nd Precipitation - Cities and FUAs — Extreme precipitation days 24.25 Days per year 2024 up 47.0% 126th Precipitation - Cities and FUAs — Change in extreme precipitation 7.97 Days per year 2024 up 3,574.5% 78th Wind threats - Cities and FUAs — Exposure to wind threats 0 Percentage of area 2023 down 100.0% 273rd Coastal flooding - Cities and FUAs — Built-up area exposure to 69.75 Percentage of built-up area 2022 up 1.1% 19th Internet speed - Cities and FUAs — Downloading speed 6 Percentage of national value 2025 up 27.7% 634th Internet speed - Cities and FUAs — Uploading speed 15.5 Percentage of national value 2025 up 82.4% 383rd