Reference Data in Greater Sydney 11 indicators covering reference data for Greater Sydney. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 155 Degree days 2025 down 39.3% 562nd Cooling and heating degree days - Cities and FUAs — Change in cooling -67.67 Degree days 2025 down 306.1% 1168th Cooling and heating degree days - Cities and FUAs 360.06 Degree days 2025 down 32.2% 1113th Cooling and heating degree days - Cities and FUAs — Change in heating -174.86 Degree days 2025 down 4,410.6% 420th Precipitation - Cities and FUAs — Extreme precipitation days 7.66 Days per year 2024 up 18.6% 557th Precipitation - Cities and FUAs — Change in extreme precipitation -0.3594 Days per year 2024 up 77.0% 947th Dependency ratio - Cities and FUAs 21.6 Percentage of population aged 15-64 years 2024 up 16.1% 976th 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 0.0045 Percentage of built-up area 2022 down 20.3% 267th Internet speed - Cities and FUAs — Downloading speed 2.2 Percentage of national value 2025 down 69.9% 808th Internet speed - Cities and FUAs — Uploading speed 2.9 Percentage of national value 2025 up 238.1% 656th