What is the air quality in Kumamoto?

Kumamoto, Japan has an annual US AQI of 62 (Polluted) and average PM2.5 of 14.9 µg/m³, ranking #2359 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Kumamoto?

July is typically the cleanest month (AQI 55) and May the most polluted (AQI 71).

Where does Kumamoto's air quality data come from?

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

Kumamoto, Japan — Air Quality & Clean City Guide 2026

Kumamoto Air Quality Data

Global rank	City	Continent	AQI	PM2.5
2359	Kumamoto, Japan	Asia	AQI 62	PM2.5 14.9 µg/m³