Worst air pollution Cangas de Onís, today and tomorrow

On 30 August 2026, overall air quality in Cangas de Onís is fair. AQI is the main air quality indicator at 25.0/100. Pollution peaks around 3:00 PM (O3: 25.0/100).

On 31 August 2026, air quality conditions in Cangas de Onís will be better than today, with AQI forecast at good at 19.9/100. Pollution peaks around 5:00 PM (O3: 19.9/100).

When is air quality typically worst in Parque Nacional Picos de Europa? The coldest months usually see the year's poorest conditions, since calm anticyclonic weather holds local traffic and wood-burning pollution near street level. Conditions tend to ease in spring, as more active weather systems bring the wind and rain needed to disperse ground-level pollution. Summer can bring periodic wildfire smoke on top of the usual ozone build-up from intense heat and sunshine. Early autumn can still bring warm, stagnant spells before the season's returning rain and wind begin clearing the air. The area's maritime climate, with frequent fronts rolling in off the Atlantic, generally prevents pollution from lingering for long.

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.

Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.

During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.