What is the air quality in Udon Thani?

Udon Thani, Thailand has an annual US AQI of 82 (Polluted) and average PM2.5 of 25.1 µg/m³, ranking #3878 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Udon Thani?

July is typically the cleanest month (AQI 52) and March the most polluted (AQI 124).

Where does Udon Thani's air quality data come from?

PM2.5: 1998–2026 (monitors 2021–2026, satellite 1998–2021; 2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Udon Thani, Thailand — Air Quality & Clean City Guide 2026

Udon Thani Air Quality Data

Global rank	City	Continent	AQI	PM2.5
3878	Udon Thani, Thailand	Asia	AQI 82	PM2.5 25.1 µg/m³