Worst air pollution Gràcia - Barcelona, today and tomorrow

On 19 July 2026, overall air quality in Gràcia is fair. NO2 is the main pollutant at 32.3/100. Pollution peaks around 3:00 PM (O3: 48.6/100).

On 20 July 2026, air quality conditions in Gràcia will be similar to today, with NO2 forecast at fair at 34.6/100. Pollution peaks around 3:00 PM (O3: 58.4/100).

What time of year has the cleanest air in Gràcia? The year's lowest air quality readings tend to cluster in winter, when high-pressure systems suppress the mixing that would otherwise clear away exhaust and smoke. By spring, air quality usually starts trending upward as the calm winter inversions give way to more unsettled, breezier weather. The long, hot days of summer favour ozone build-up, which can spike on the stillest, sunniest afternoons. Autumn typically starts mild and can still see occasional ozone or dust episodes before rain and cooler temperatures gradually restore cleaner conditions. The Mediterranean coast's sea breezes generally help disperse pollution, though summer tourism traffic and occasional Saharan dust can still push levels up.

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.