Environment in San Diego 13 indicators covering environment for San Diego. IndicatorLatest Year10-yr change Rank Drought - Cities and FUAs — Land soil moisture anomaly -18.7 Percentage change 2025 down 39.6% 1296th Greenhouse gas emissions - Cities and FUAs — GHG emissions from waste 2.1 Tonnes of CO2-equivalent 2024 down 4.5% 18th Total and environment-related patents - FUAs — Patent applications 4,299 Patents 2022 up 39.9% 2nd Land surface temperature - Cities and FUAs — Daytime summer land 41.1 Degrees celsius 2024 down 6.4% 80th Land surface temperature - Cities and FUAs — Daytime winter land 18.53 Degrees celsius 2024 down 21.9% 221st Land surface temperature - Cities and FUAs — Daytime yearly land 32 Degrees celsius 2024 down 6.7% 105th Land surface temperature - Cities and FUAs — Nighttime summer land 19.97 Degrees celsius 2024 up 1.9% 337th Land surface temperature - Cities and FUAs — Nighttime winter land 5.83 Degrees celsius 2024 down 13.9% 285th Land surface temperature - Cities and FUAs — Nighttime yearly land 12.8 Degrees celsius 2024 down 0.7% 257th Air pollution - Cities and FUAs — Population exposure to nitrogen 32.61 Microgrammes per cubic metre 2025 — 655th Air pollution - Cities and FUAs — Population exposure to ozone 53.05 Microgrammes per cubic metre 2025 — 1117th Air pollution - Cities and FUAs — Population exposure to PM10 33.27 Microgrammes per cubic metre 2025 — 884th Air pollution - Cities and FUAs — Population exposure to PM2.5 12.65 Microgrammes per cubic metre 2025 — 1020th