What is the air quality in San Nicolás de los Garza?

San Nicolás de los Garza, Mexico has an annual US AQI of 78 (Polluted) and average PM2.5 of 23.6 µg/m³, ranking #3720 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in San Nicolás de los Garza?

June is typically the cleanest month (AQI 70) and December the most polluted (AQI 93).

Where does San Nicolás de los Garza's air quality data come from?

PM2.5: 1998–2026 (monitors 2003–2026, satellite 1998–2010, 2013, 2015–2018; 2025–2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

San Nicolás de los Garza, Mexico — Air Quality & Clean City Guide 2026

San Nicolás de los Garza Air Quality Data

Global rank	City	Continent	AQI	PM2.5
3720	San Nicolás de los Garza, Mexico	North America	AQI 78	PM2.5 23.6 µg/m³