What is the air quality in Hiroshima?

Hiroshima, Japan has an annual US AQI of 61 (Polluted) and average PM2.5 of 13.8 µg/m³, ranking #2195 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Hiroshima?

December is typically the cleanest month (AQI 53) and May the most polluted (AQI 76).

Where does Hiroshima's air quality data come from?

PM2.5: 1998–2026 (monitors 2011–2026, satellite 1998–2011; 2025–2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Hiroshima, Japan — Air Quality & Clean City Guide 2026

Hiroshima Air Quality Data

Global rank	City	Continent	AQI	PM2.5
2195	Hiroshima, Japan	Asia	AQI 61	PM2.5 13.8 µg/m³