What is the air quality in Bern?

Bern, Switzerland has an annual US AQI of 57 (Reasonable) and average PM2.5 of 12.5 µg/m³, ranking #1582 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Bern?

September is typically the cleanest month (AQI 49) and January the most polluted (AQI 67).

Where does Bern's air quality data come from?

PM2.5: 1998–2026 (low-cost sensors 2024–2026, satellite 1998–2024, model 2025). From calibrated low-cost sensors, because no government monitor covers the city. Full sources are on the methodology page.

Bern, Switzerland — Air Quality & Clean City Guide 2026

Bern Air Quality Data

Global rank	City	Continent	AQI	PM2.5
1582	Bern, Switzerland	Europe	AQI 57	PM2.5 12.5 µg/m³