What is the air quality in Ljubljana?

Ljubljana, Slovenia has an annual US AQI of 70 (Polluted) and average PM2.5 of 18.9 µg/m³, ranking #3187 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Ljubljana?

May is typically the cleanest month (AQI 55) and January the most polluted (AQI 98).

Where does Ljubljana's air quality data come from?

PM2.5: 1998–2026 (monitors 2008–2026, satellite 1998–2007; 2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Ljubljana, Slovenia — Air Quality & Clean City Guide 2026

Ljubljana Air Quality Data

Global rank	City	Continent	AQI	PM2.5
3187	Ljubljana, Slovenia	Europe	AQI 70	PM2.5 18.9 µg/m³