Reference Data in Okayama 14 indicators covering reference data for Okayama. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 492.61 Degree days 2025 up 79.8% 213th Cooling and heating degree days - Cities and FUAs — Change in cooling 139.45 Degree days 2025 up 276.2% 124th Cooling and heating degree days - Cities and FUAs 1,211 Degree days 2025 down 3.0% 812th Cooling and heating degree days - Cities and FUAs — Change in heating -182.32 Degree days 2025 down 26.3% 428th Cooling and heating degree days - Cities and FUAs — Change in heating -130.54 % change on previous year 2025 up 74.9% 1066th Cooling and heating degree days - Cities and FUAs, annual growth rate -7.86 % change on previous year 2025 up 37.2% 674th Cooling and heating degree days - Cities and FUAs — Change in cooling -25.96 % change on previous year 2025 up 43.8% 176th Cooling and heating degree days - Cities and FUAs — Cooling degree -9.03 % change on previous year 2025 down 8.0% 187th Precipitation - Cities and FUAs — Extreme precipitation days 31.33 Days per year 2024 up 75.7% 64th Precipitation - Cities and FUAs — Change in extreme precipitation 13.28 Days per year 2024 up 5,915.7% 18th Wind threats - Cities and FUAs — Exposure to wind threats 0 Percentage of area 2023 — 271st Coastal flooding - Cities and FUAs — Built-up area exposure to 0.7448 Percentage of built-up area 2022 up 0.7% 117th Internet speed - Cities and FUAs — Downloading speed -8.1 Percentage of national value 2025 up 71.8% 1102nd Internet speed - Cities and FUAs — Uploading speed -13.3 Percentage of national value 2025 down 75.0% 948th