City comparison
Lima vs São Paulo air quality
Live AQI comparison between Lima and São Paulo. Data updates every 15 minutes.
What drives air quality in Lima and São Paulo
Lima
Lima's coastal desert setting produces persistent low cloud and inversion layers that limit vertical mixing, allowing traffic and industrial emissions to accumulate near the surface. Fine particles often dominate year-round exposure along busy corridors.
São Paulo
São Paulo's vast urban footprint and heavy vehicle activity make traffic emissions a persistent driver of local air pollution. Nitrogen dioxide peaks near major avenues and logistics routes, while fine particles can spread more broadly under low-wind conditions. Urban heat and dense development influence how quickly pollutants disperse.
Both cities are shaped by different combinations of traffic density, terrain, weather patterns, and seasonal events, which is why the same AQI band can feel different on the ground. Checking live readings rather than relying on reputation or past visits is the most reliable way to plan travel, exercise, or outdoor time between the two.
Live AQI from Open-Meteo (CAMS). Conditions change hourly — refresh for the latest readings. South African cities may show WAQI station data on their dedicated pages.