Reference Data in Cheonan 11 indicators covering reference data for Cheonan. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 377.61 Degree days 2025 up 20.6% 313th Cooling and heating degree days - Cities and FUAs — Change in cooling 105.18 Degree days 2025 up 158.8% 178th Cooling and heating degree days - Cities and FUAs 2,069 Degree days 2025 up 2.3% 351st Cooling and heating degree days - Cities and FUAs — Change in heating -198.6 Degree days 2025 up 18.9% 462nd Precipitation - Cities and FUAs — Extreme precipitation days 17.31 Days per year 2024 up 2.2% 235th Precipitation - Cities and FUAs — Change in extreme precipitation -0.624 Days per year 2024 up 37.5% 995th Dependency ratio - Cities and FUAs 17.7 Percentage of population aged 15-64 years 2023 up 53.9% 1065th 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 2 Percentage of national value 2025 down 82.8% 816th Internet speed - Cities and FUAs — Uploading speed 4.2 Percentage of national value 2025 down 83.5% 629th