Reference Data in San Francisco (Greater) 12 indicators covering reference data for San Francisco (Greater). IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 43.76 Degree days 2025 down 85.3% 794th Cooling and heating degree days - Cities and FUAs — Change in cooling -202.77 Degree days 2025 down 497.4% 1298th Cooling and heating degree days - Cities and FUAs 765.84 Degree days 2025 down 1.0% 974th Cooling and heating degree days - Cities and FUAs — Change in heating -226.07 Degree days 2025 down 3.6% 501st Precipitation - Cities and FUAs — Extreme precipitation days 6.29 Days per year 2024 down 4.2% 630th Precipitation - Cities and FUAs — Change in extreme precipitation 0.5225 Days per year 2024 down 34.3% 759th Dependency ratio - Cities and FUAs 25.2 Percentage of population aged 15-64 years 2024 up 31.2% 824th Wind threats - Cities and FUAs — Exposure to wind threats 11.72 Percentage of area 2023 — 196th Coastal flooding - Cities and FUAs — Built-up area exposure to 6.35 Percentage of built-up area 2022 up 6.1% 64th Main mode of transport to work - Cities and FUAs — Employed persons 2.49 million Persons 2023 down 6.7% 7th Internet speed - Cities and FUAs — Downloading speed 5 Percentage of national value 2025 down 67.5% 683rd Internet speed - Cities and FUAs — Uploading speed 1.9 Percentage of national value 2025 up 137.5% 679th