What is the air quality in León?

León, Spain has an annual US AQI of 48 (Reasonable) and average PM2.5 of 9.1 µg/m³, ranking #603 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in León?

October is typically the cleanest month (AQI 45) and March the most polluted (AQI 51).

Where does León's air quality data come from?

PM2.5: 1998–2026 (monitors 2013–2023, satellite 1998–2012, 2016–2017, 2020, 2023–2024, model 2025–2026). Measured by government monitoring stations. Full sources are on the methodology page.

León, Spain — Air Quality & Clean City Guide 2026

León Air Quality Data

Global rank	City	Continent	AQI	PM2.5
603	León, Spain	Europe	AQI 48	PM2.5 9.1 µg/m³