What is the air quality in Jōetsu?

Jōetsu, Japan has an annual US AQI of 56 (Reasonable) and average PM2.5 of 12.1 µg/m³, ranking #1446 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Jōetsu?

December is typically the cleanest month (AQI 44) and May the most polluted (AQI 69).

Where does Jōetsu's air quality data come from?

PM2.5: 1998–2026 (monitors 2013–2026, satellite 1998–2013, 2019; 2025–2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Jōetsu, Japan — Air Quality & Clean City Guide 2026

Jōetsu Air Quality Data

Global rank	City	Continent	AQI	PM2.5
1446	Jōetsu, Japan	Asia	AQI 56	PM2.5 12.1 µg/m³