Worst air pollution Leganés, today and tomorrow

On 16 July 2026, overall air quality in Leganés is fair. AQI is the main air quality indicator at 36.2/100. Pollution peaks around 3:00 PM (O3: 36.2/100).

On 17 July 2026, air quality conditions in Leganés will be similar to today, with AQI forecast at fair at 38.9/100. Pollution peaks around 3:00 PM (O3: 38.9/100).

When is air quality typically worst in Leganés? Winter high-pressure systems tend to produce the year's worst episodes, as still air traps traffic fumes and heating smoke at ground level. Spring is typically when conditions begin improving, as increasing wind speeds help disperse traffic emissions before they can accumulate. During summer, strong sunlight and high temperatures accelerate ozone formation, occasionally offsetting the drop in traffic and heating-related emissions. Autumn usually sees a steady return to cleaner conditions as the ozone-favouring heat of summer fades and rainfall picks up. Being inland, this area sees more extreme summer heat and winter cold, which sharpens the seasonal contrast in air quality.

It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.