What is the air quality in Modesto CA?

Modesto CA, United States of America has an annual US AQI of 61 (Polluted) and average PM2.5 of 13.6 µg/m³, ranking #2190 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Modesto CA?

April is typically the cleanest month (AQI 45) and December the most polluted (AQI 83).

Where does Modesto CA's air quality data come from?

PM2.5: 1998–2026 (monitors 1999–2026, satellite 1998–1999, 2015; 2026 provisional (AirNow)). Measured by government monitoring stations. Full sources are on the methodology page.

Modesto CA, United States of America — Air Quality & Clean City Guide 2026

Modesto CA Air Quality Data

Global rank	City	Continent	AQI	PM2.5
2190	Modesto CA, United States of America	North America	AQI 61	PM2.5 13.6 µg/m³