Reference Data in Greater Perth 11 indicators covering reference data for Greater Perth. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 429.12 Degree days 2025 down 23.0% 261st Cooling and heating degree days - Cities and FUAs — Change in cooling -47.63 Degree days 2025 down 159.2% 1104th Cooling and heating degree days - Cities and FUAs 283.3 Degree days 2025 down 1.9% 1136th Cooling and heating degree days - Cities and FUAs — Change in heating -73.36 Degree days 2025 down 8.0% 228th Precipitation - Cities and FUAs — Extreme precipitation days 4.67 Days per year 2024 down 25.0% 777th Precipitation - Cities and FUAs — Change in extreme precipitation 0.5967 Days per year 2024 down 72.3% 743rd Dependency ratio - Cities and FUAs 23.8 Percentage of population aged 15-64 years 2024 up 27.3% 889th Wind threats - Cities and FUAs — Exposure to wind threats 1.79 Percentage of area 2023 unchanged 251st Coastal flooding - Cities and FUAs — Built-up area exposure to 0.0123 Percentage of built-up area 2022 up 14.6% 245th Internet speed - Cities and FUAs — Downloading speed -1.7 Percentage of national value 2025 up 73.0% 944th Internet speed - Cities and FUAs — Uploading speed -1.1 Percentage of national value 2025 down 118.0% 747th