Reference Data in Napa 12 indicators covering reference data for Napa. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 173.28 Degree days 2025 down 63.6% 538th Cooling and heating degree days - Cities and FUAs — Change in cooling -279.53 Degree days 2025 down 1,303.1% 1314th Cooling and heating degree days - Cities and FUAs 775.83 Degree days 2025 down 1.3% 971st Cooling and heating degree days - Cities and FUAs — Change in heating -254.41 Degree days 2025 down 4.1% 555th Precipitation - Cities and FUAs — Extreme precipitation days 12.54 Days per year 2024 up 52.2% 380th Precipitation - Cities and FUAs — Change in extreme precipitation 2.77 Days per year 2024 up 280.4% 355th Dependency ratio - Cities and FUAs 35.5 Percentage of population aged 15-64 years 2024 up 37.1% 312th 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 6.9 Percentage of built-up area 2022 up 18.9% 62nd Main mode of transport to work - Cities and FUAs — Employed persons 58,148 Persons 2023 down 5.2% 229th Internet speed - Cities and FUAs — Downloading speed -16.9 Percentage of national value 2025 down 238.0% 1228th Internet speed - Cities and FUAs — Uploading speed -51 Percentage of national value 2025 up 1.4% 1286th