What is the air quality in Celje?

Celje, Slovenia has an annual US AQI of 68 (Polluted) and average PM2.5 of 18.4 µg/m³, ranking #3057 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Celje?

May is typically the cleanest month (AQI 53) and January the most polluted (AQI 98).

Where does Celje's air quality data come from?

PM2.5: 1998–2026 (monitors 2020–2026, satellite 1998–2019, model 2025; 2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Celje, Slovenia — Air Quality & Clean City Guide 2026

Celje Air Quality Data

Global rank	City	Continent	AQI	PM2.5
3057	Celje, Slovenia	Europe	AQI 68	PM2.5 18.4 µg/m³