Reference Data in Osan 11 indicators covering reference data for Osan. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 368.31 Degree days 2025 up 18.4% 322nd Cooling and heating degree days - Cities and FUAs — Change in cooling 119.03 Degree days 2025 up 92.6% 154th Cooling and heating degree days - Cities and FUAs 2,088 Degree days 2025 up 2.6% 340th Cooling and heating degree days - Cities and FUAs — Change in heating -182.92 Degree days 2025 up 22.6% 431st Precipitation - Cities and FUAs — Extreme precipitation days 16.25 Days per year 2024 down 3.0% 262nd Precipitation - Cities and FUAs — Change in extreme precipitation -1.33 Days per year 2024 down 60.0% 1147th Dependency ratio - Cities and FUAs 15.8 Percentage of population aged 15-64 years 2023 up 68.1% 1095th 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 20.8 Percentage of national value 2025 down 41.1% 173rd Internet speed - Cities and FUAs — Uploading speed 22.1 Percentage of national value 2025 down 48.8% 262nd