What is the air quality in Santiago?

Santiago, Chile has an annual US AQI of 81 (Polluted) and average PM2.5 of 24.6 µg/m³, ranking #3841 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Santiago?

January is typically the cleanest month (AQI 62) and June the most polluted (AQI 117).

Where does Santiago's air quality data come from?

PM2.5: 1998–2026 (monitors 2016–2026, satellite 1998–2016, 2018, 2021–2023; 2025–2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Santiago, Chile — Air Quality & Clean City Guide 2026

Santiago Air Quality Data

Global rank	City	Continent	AQI	PM2.5
3841	Santiago, Chile	South America	AQI 81	PM2.5 24.6 µg/m³