Reference Data in Jacksonville 12 indicators covering reference data for Jacksonville. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 686.09 Degree days 2025 down 18.5% 143rd Cooling and heating degree days - Cities and FUAs — Change in cooling -64.5 Degree days 2025 down 170.5% 1161st Cooling and heating degree days - Cities and FUAs 265.64 Degree days 2025 up 10.7% 1144th Cooling and heating degree days - Cities and FUAs — Change in heating -61.83 Degree days 2025 up 29.3% 208th Precipitation - Cities and FUAs — Extreme precipitation days 15.09 Days per year 2024 up 16.1% 291st Precipitation - Cities and FUAs — Change in extreme precipitation 5.72 Days per year 2024 up 57.6% 142nd Dependency ratio - Cities and FUAs 24.4 Percentage of population aged 15-64 years 2024 up 31.2% 858th 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 0.0592 Percentage of built-up area 2022 down 5.1% 196th Main mode of transport to work - Cities and FUAs — Employed persons 425,340 Persons 2023 up 11.1% 41st Internet speed - Cities and FUAs — Downloading speed 18 Percentage of national value 2025 down 26.5% 244th Internet speed - Cities and FUAs — Uploading speed 35.8 Percentage of national value 2025 down 18.6% 139th