What is the air quality in Shimonoseki?

Shimonoseki, Japan has an annual US AQI of 61 (Polluted) and average PM2.5 of 14.5 µg/m³, ranking #2253 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Shimonoseki?

September is typically the cleanest month (AQI 56) and May the most polluted (AQI 74).

Where does Shimonoseki's air quality data come from?

PM2.5: 1998–2025 (monitors 2012–2025, satellite 1998–2012; 2025 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Shimonoseki, Japan — Air Quality & Clean City Guide 2026

Shimonoseki Air Quality Data

Global rank	City	Continent	AQI	PM2.5
2253	Shimonoseki, Japan	Asia	AQI 61	PM2.5 14.5 µg/m³