What is the air quality in Jeju?

Jeju, South Korea has an annual US AQI of 66 (Polluted) and average PM2.5 of 17 µg/m³, ranking #2834 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Jeju?

July is typically the cleanest month (AQI 57) and May the most polluted (AQI 77).

Where does Jeju'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.

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

Jeju Air Quality Data

Global rank	City	Continent	AQI	PM2.5
2834	Jeju, South Korea	Asia	AQI 66	PM2.5 17 µg/m³