Reference Data in Daejeon 11 indicators covering reference data for Daejeon. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 356.88 Degree days 2025 up 25.3% 335th Cooling and heating degree days - Cities and FUAs — Change in cooling 90.93 Degree days 2025 up 384.2% 215th Cooling and heating degree days - Cities and FUAs 2,017 Degree days 2025 up 2.8% 379th Cooling and heating degree days - Cities and FUAs — Change in heating -187.71 Degree days 2025 up 22.4% 443rd Precipitation - Cities and FUAs — Extreme precipitation days 14.15 Days per year 2024 down 11.5% 328th Precipitation - Cities and FUAs — Change in extreme precipitation -2.53 Days per year 2024 down 270.6% 1247th Dependency ratio - Cities and FUAs 23.7 Percentage of population aged 15-64 years 2023 up 79.5% 896th 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 -9.1 Percentage of national value 2025 down 259.6% 1130th Internet speed - Cities and FUAs — Uploading speed -9.4 Percentage of national value 2025 down 208.0% 896th