Worst air pollution Sigtuna, today and tomorrow

On 16 July 2026, overall air quality in Sigtuna is fair. AQI is the main air quality indicator at 24.9/100. Pollution peaks around 6:00 PM (O3: 24.9/100).

On 17 July 2026, air quality conditions in Sigtuna will be similar to today, with AQI forecast at fair at 33.1/100. Pollution peaks around 1:00 PM (O3: 33.1/100).

How does air quality change throughout the year in Sigtuna? Winter is usually the toughest stretch, as temperature inversions during still, cold weather trap local wood-burning and vehicle emissions near street level. By spring, more frequent fronts and wind usually disperse pollutants faster, even as tree pollen becomes the bigger seasonal concern. The warmer months usually see the cleanest air of the year, aided by better ventilation and reduced wood-burning. Conditions gradually shift through autumn, with cooling temperatures reviving wood-burning and calmer nights allowing brief local build-ups. This is a fairly standard seasonal pattern for central Sweden, with a well-defined winter and summer.

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.