What is the air quality in Coimbra?

Coimbra, Portugal has an annual US AQI of 53 (Reasonable) and average PM2.5 of 11 µg/m³, ranking #1065 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Coimbra?

April is typically the cleanest month (AQI 49) and January the most polluted (AQI 57).

Where does Coimbra's air quality data come from?

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

Coimbra, Portugal — Air Quality & Clean City Guide 2026

Coimbra Air Quality Data

Global rank	City	Continent	AQI	PM2.5
1065	Coimbra, Portugal	Europe	AQI 53	PM2.5 11 µg/m³