What is the air quality in Yokosuka?

Yokosuka, Japan has an annual US AQI of 57 (Reasonable) and average PM2.5 of 12.5 µg/m³, ranking #1603 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Yokosuka?

January is typically the cleanest month (AQI 53) and May the most polluted (AQI 63).

Where does Yokosuka's air quality data come from?

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

Yokosuka, Japan — Air Quality & Clean City Guide 2026

Yokosuka Air Quality Data

Global rank	City	Continent	AQI	PM2.5
1603	Yokosuka, Japan	Asia	AQI 57	PM2.5 12.5 µg/m³