Reference Data in Phoenix 16 indicators covering reference data for Phoenix. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 1,543 Degree days 2025 down 2.9% 29th Cooling and heating degree days - Cities and FUAs — Change in cooling 30.16 Degree days 2025 down 60.5% 335th Cooling and heating degree days - Cities and FUAs 251.43 Degree days 2025 down 47.9% 1141st Cooling and heating degree days - Cities and FUAs — Change in heating -323.49 Degree days 2025 down 250.9% 655th Cooling and heating degree days - Cities and FUAs — Change in heating -916.91 % change on previous year 2025 down 1,957.6% 1290th Cooling and heating degree days - Cities and FUAs, annual growth rate -53.71 % change on previous year 2025 down 334.8% 1194th Cooling and heating degree days - Cities and FUAs — Change in cooling -91.19 % change on previous year 2025 down 160.0% 462nd Cooling and heating degree days - Cities and FUAs — Cooling degree -16.82 % change on previous year 2025 down 664.6% 312th Precipitation - Cities and FUAs — Extreme precipitation days 1.33 Days per year 2024 down 51.2% 1181st Precipitation - Cities and FUAs — Change in extreme precipitation -1.34 Days per year 2024 down 2,171.6% 1143rd Dependency ratio - Cities and FUAs 25.8 Percentage of population aged 15-64 years 2024 up 22.9% 784th 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 Main mode of transport to work - Cities and FUAs — Employed persons 1.78 million Persons 2023 up 10.6% 10th Internet speed - Cities and FUAs — Downloading speed 4.5 Percentage of national value 2025 up 80.0% 701st Internet speed - Cities and FUAs — Uploading speed -0.2 Percentage of national value 2025 up 99.2% 723rd