What is the air quality in Wonju?

Wonju, South Korea has an annual US AQI of 81 (Polluted) and average PM2.5 of 23.6 µg/m³, ranking #3832 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Wonju?

September is typically the cleanest month (AQI 55) and January the most polluted (AQI 96).

Where does Wonju's air quality data come from?

PM2.5: 1998–2026 (monitors 2015–2026, satellite 1998–2014; 2025–2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Wonju, South Korea — Air Quality & Clean City Guide 2026

Wonju Air Quality Data

Global rank	City	Continent	AQI	PM2.5
3832	Wonju, South Korea	Asia	AQI 81	PM2.5 23.6 µg/m³