What is the air quality in Monterrey?

Monterrey, Mexico has an annual US AQI of 76 (Polluted) and average PM2.5 of 22.1 µg/m³, ranking #3581 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Monterrey?

September is typically the cleanest month (AQI 68) and May the most polluted (AQI 85).

Where does Monterrey's air quality data come from?

PM2.5: 1998–2026 (monitors 2003–2015, 2017–2026, satellite 1998–2006, 2009, 2013, 2015–2019, 2024; 2025–2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Monterrey, Mexico — Air Quality & Clean City Guide 2026

Monterrey Air Quality Data

Global rank	City	Continent	AQI	PM2.5
3581	Monterrey, Mexico	North America	AQI 76	PM2.5 22.1 µg/m³