Reference Data in Sofia 40 indicators covering reference data for Sofia. IndicatorLatest Year10-yr change Rank Cooling and heating degree days by NUTS 2 regions - annual data 5.37 % change on previous year 2025 up 125.9% 945th Cooling and heating degree days - Cities and FUAs — Cooling degree 80.55 Degree days 2025 down 30.0% 685th Cooling and heating degree days - Cities and FUAs — Change in cooling 7.53 Degree days 2025 down 82.1% 420th Cooling and heating degree days - Cities and FUAs 2,293 Degree days 2025 down 10.1% 257th Cooling and heating degree days - Cities and FUAs — Change in heating -481.23 Degree days 2025 down 114.7% 1034th Cooling and heating degree days - Cities and FUAs — Change in heating -21.67 % change on previous year 2025 down 144.8% 599th Cooling and heating degree days - Cities and FUAs, annual growth rate -3.6 % change on previous year 2025 down 140.1% 530th Cooling and heating degree days - Cities and FUAs — Change in cooling -93.7 % change on previous year 2025 down 129.1% 479th Cooling and heating degree days - Cities and FUAs — Cooling degree -58.15 % change on previous year 2025 down 151.5% 878th Cooling and heating degree days by NUTS 2 regions - monthly data -5.43 % change on previous year 2025 up 8.9% 1169th Precipitation - Cities and FUAs — Change in extreme precipitation -1.03 Days per year 2024 down 162.5% 1081st Precipitation - Cities and FUAs — Extreme precipitation days 1.55 Days per year 2024 down 63.3% 1165th Cooling and heating degree days by NUTS 2 regions - annual data 2,814 Number 2025 down 4.6% 604th Cooling and heating degree days by NUTS 2 regions - monthly data 475.53 Number 2025 down 1.5% 436th Dependency ratio - Cities and FUAs 33.4 Percentage of population aged 15-64 years 2025 up 7.7% 398th 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 Percentage of built-up area 2022 — 277th Deaths (total) by NUTS 3 region 3,944 Number 2024 down 7.3% 928th Internet speed - Cities and FUAs — Downloading speed 30.4 Percentage of national value 2025 up 55.1% 75th Internet speed - Cities and FUAs — Uploading speed 37.2 Percentage of national value 2025 up 332.6% 134th Deaths by week, sex and NUTS 3 region 69 Number 2026 down 47.7% 811th Deaths by week and NUTS 3 region 69 Number 2026 down 47.7% 811th Deaths by week, sex, 5-year age group and NUTS 3 region 69 Number 2026 down 47.7% 806th Correction coefficients outside the European Union (Duty stations) 86.3 Index 2008 up 27.5% 70th Purchasing Power Parities outside the European Union (Duty stations) 1.69 Purchasing power standard (PPS) 2008 up 27.5% 126th Road accidents by NUTS 3 region 162 Number 2024 down 8.0% 1399th Area by NUTS 3 region 7,063 Square kilometre 2026 unchanged 583rd Correction coefficients outside the European Union (Duty stations) 81.7 Index 2007 up 14.1% 84th National road freight transport by region of unloading (NUTS 3) and 9,205 Thousand tonnes 2025 down 28.4% 635th National road freight transport by region of loading (NUTS 3) and 11,957 Thousand tonnes 2025 up 12.6% 483rd Police-recorded offences by NUTS 3 region 5 Number 2024 down 16.7% 487th Nights spent at tourist accommodation establishments by NUTS 3 region 707,173 Number 2024 — 1087th Deaths by age group, sex and NUTS 3 region 3,944 Number 2024 down 7.3% 926th Guest nights spent at short-stay accommodation offered via 168,817 Number 2025 up 141.0% 598th Nights spent at tourist accommodation establishments by NUTS 3 region 707,173 Number 2024 — 671st Area by NUTS 3 region 6,969 Square kilometre 2015 down 1.3% 494th Establishments, bedrooms and bed-places in tourist accommodation by 56 Number 2011 up 143.5% 1354th Correction coefficients in the European Union (Duty stations) - index 66.1 Index 2025 up 26.9% 32nd Purchasing Power Parities in the European Union (Duty stations) 1.29 Index 2025 up 26.8% 8th Nitrogen dioxide concentrations in European capital cities - monthly 17.4 Micrograms per cubic metre 2026 down 51.4% 7th