What is the air quality in Heidelberg?

Heidelberg, Germany has an annual US AQI of 53 (Reasonable) and average PM2.5 of 10.8 µg/m³, ranking #1046 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Heidelberg?

September is typically the cleanest month (AQI 46) and March the most polluted (AQI 62).

Where does Heidelberg's air quality data come from?

PM2.5: 1998–2026 (monitors 2021–2026, satellite 1998–2020; 2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Heidelberg, Germany — Air Quality & Clean City Guide 2026

Heidelberg Air Quality Data

Global rank	City	Continent	AQI	PM2.5
1046	Heidelberg, Germany	Europe	AQI 53	PM2.5 10.8 µg/m³