What is the air quality in Yilan?

Yilan, Taiwan has an annual US AQI of 59 (Reasonable) and average PM2.5 of 14.3 µg/m³, ranking #2019 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Yilan?

July is typically the cleanest month (AQI 50) and April the most polluted (AQI 69).

Where does Yilan's air quality data come from?

PM2.5: 1998–2026 (monitors 2004–2026, satellite 1998–2004, 2015; 2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Yilan, Taiwan — Air Quality & Clean City Guide 2026

Yilan Air Quality Data

Global rank	City	Continent	AQI	PM2.5
2019	Yilan, Taiwan	Asia	AQI 59	PM2.5 14.3 µg/m³